#Question

78 messages · Page 1 of 1 (latest)

stark mulch
oak windBOT
#
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slate aspen
#

,rotate

smoky parcelBOT
sour lynx
# stark mulch

You have a system of equations:
3x^2 + 2y^2 = 12
y = x - 3
As you can see, y is already expressed in terms of x in the second equation. So, try substituting it into the first equation.

stark mulch
sour lynx
stark mulch
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i fogor everything i learnt

sour lynx
stark mulch
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I put that it and got math error

IMG_1434.jpg
sour lynx
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Don't use a calculator.

slate aspen
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if you set it equal to 0

sour lynx
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I mean, doesn't matter if it is, you can just use the quadratic formula.

stark mulch
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Why can’t I use a calculator

sour lynx
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Because this is a math question.

stark mulch
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It’s a calculator allowed test

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And I used it and it said maths error

sour lynx
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But why would you use a calculator to solve a quadratic equation?

stark mulch
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It’s quicker

sour lynx
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That's not the point...

slate aspen
stark mulch
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Okay okay

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Thanks for the help

slate aspen
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but

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before i reveal it to you

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solve it by hand

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it doesn’t hurt to factor or use quad formula

sour lynx
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You need to be able to solve quadratic equations on your own.

prisma aurora
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the maths error means that he set up something wrong with the quadratic

slate aspen
prisma aurora
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oh yeah i see

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thats kind of just calculator syntax though i wouldnt say it means his understanding is wrong because of that

slate aspen
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(would still reccomend OP to learn though)

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by hand helps

sour lynx
prisma aurora
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though i suppose u would need to be able to factor a quadratic

sour lynx
prisma aurora
sour lynx
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I mean, I'm not sure how a calculator is even supposed to help on a math exam in uni.

prisma aurora
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well i mean how are students meant to know sin(56)

sour lynx
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That isn't going to be encountered in a math exam.

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More like physics.

prisma aurora
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in the uk it is

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the exams are kind of designed with the fact u get a calculator in mind

sour lynx
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Oh.

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Interesting.

slate aspen
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(idek why its designed like that but education systems ig)

stark mulch
sour lynx
stark mulch
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It says to do it to 1 dp

sour lynx
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Oh, right, sorry. Didn't notice that.
Still, what are the exact values you got?

slate aspen
#

y=x-3

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1.3+3=4.3

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?

prisma aurora
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i think they missed a negative sign

stark mulch
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Wait lemme redo it

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I missed out a negative

slate aspen
#

ok

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it looks right now

stark mulch
slate aspen
#

yeap

stark mulch
#

Thanks

slate aspen
#

with the rounding stuff its right

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👍

stark mulch
#

+close

limpid briarBOT
# stark mulch +close
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