Need help with factorising and cadric equation | Mathematics | Page 1

unborn zincBOT Dec 9, 2024, 8:14 AM

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next ledge Dec 9, 2024, 8:18 AM

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note that (3x-2)(4x+7) is not in the form of a(x-x1)(x-x2)

half pendant Dec 9, 2024, 8:21 AM

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But 12(3x-2)(4x+7) is

next ledge Dec 9, 2024, 8:22 AM

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that isn't either

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when it says "x"

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it means 1x

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not "ax" or "3x" or "4x"

half pendant Dec 9, 2024, 8:24 AM

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Its because i hade to switch the fraction into numbers

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I wrote it using the fractions next to it too

next ledge Dec 9, 2024, 8:27 AM

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yes so you have $12x^2+13x-14=12(x-\frac{2}{3})(x+\frac{7}{4})$

small irisBOT Dec 9, 2024, 8:27 AM

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Smiley ッ

half pendant Dec 9, 2024, 8:28 AM

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Yes

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But to get ride of the fraction you need to multiply the x of each weird box but the denominator of the fraction

next ledge Dec 9, 2024, 8:30 AM

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wdym

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what is your end goal here

half pendant Dec 9, 2024, 8:30 AM

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To get ride of the fraction

next ledge Dec 9, 2024, 8:30 AM

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what for?

half pendant Dec 9, 2024, 8:32 AM

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Why not xD and also because i dont know if my teacher will put me a error if i dont do it

next ledge Dec 9, 2024, 8:32 AM

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both forms would be valid answers but ig it's up to your teacher

next ledge Dec 9, 2024, 8:33 AM

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half pendant To get ride of the fraction

note that the lcd in (x-2/3) is 3, while the lcd in the other is 4

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note 12 = 3*4

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multiply the first factor by 3 and the 2nd by 4

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and you end up with (3x-2)(4x+7)

half pendant Dec 9, 2024, 8:34 AM

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12(x-\frac{2}{3})(x+\frac{7}{4})$

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Why isnt it doing a picture

next ledge Dec 9, 2024, 8:35 AM

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$

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$...$

small irisBOT Dec 9, 2024, 8:35 AM

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Smiley ッ

half pendant Dec 9, 2024, 8:35 AM

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$12(x-\frac{2}{3})(x+\frac{7}{4})$

small irisBOT Dec 9, 2024, 8:35 AM

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PAWZ

half pendant Dec 9, 2024, 8:36 AM

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Oh i think i understand

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So i dont need the 12 if i switch fraction into numbers

next ledge Dec 9, 2024, 8:38 AM

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yes, because it distributes

half pendant Dec 9, 2024, 8:38 AM

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Ohhh

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One last question

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For the factorisation method for (ax^2+bx+c) there is a method where you need to find the 2 term that is equal to a.c when multipied and b when addition

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Well my teacher said that there was a speacial mode on some calculator that lets us find the 2 term quickly but that she wont teach us how to do it since its not fair to the other who dont have it fo you know what that is ?

next ledge Dec 9, 2024, 8:46 AM

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you mean..the solutions?

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just graph it and find the zeroes

half pendant Dec 9, 2024, 8:51 AM

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Do you have a video or something to help me do that cuz i dont have any idea what is a graph

sand fjord Dec 9, 2024, 9:18 AM

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half pendant Do you have a video or something to help me do that cuz i dont have any idea wha...

Is English your native language?

half pendant Dec 9, 2024, 9:18 AM

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no french

vale barn Dec 9, 2024, 9:23 AM

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You just left the 12 there on accident on the work to the right of the standard form

#Need help with factorising and cadric equation