Quadratic formula-could someone show me how to use a calculator for this | Revision Server | Page 1

last fjord Jul 16, 2023, 2:17 PM

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worldly reef Jul 16, 2023, 2:20 PM

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$x = \frac{-b \pm \sqrt{b^2-4c}}{2a}$

kindred doveBOT Jul 16, 2023, 2:20 PM

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clarence

worldly reef Jul 16, 2023, 2:20 PM

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for a quadratic in the form ax^2 + bx + c = 0

last fjord Jul 16, 2023, 2:21 PM

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I did that but it says maths error

worldly reef Jul 16, 2023, 2:21 PM

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so in this case it would be

hollow remnant Jul 16, 2023, 2:21 PM

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What happened to the -4ac?

worldly reef Jul 16, 2023, 2:21 PM

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$x = \frac{-(-7) \pm \sqrt{(-7)^2-4(2)(-5)}}{2(-5)}$

kindred doveBOT Jul 16, 2023, 2:22 PM

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clarence

last fjord Jul 16, 2023, 2:22 PM

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Ok thank you

worldly reef Jul 16, 2023, 2:22 PM

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typo

bright garden Jul 16, 2023, 2:44 PM

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thats beautiful

acoustic star Jul 16, 2023, 4:24 PM

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You can simplify it as much as possible to make it easier to plug into the calculator

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Like making -(-7) into 7

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And make it (7 + root 89)/-10

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Or (7-root89)/-10

#Quadratic formula-could someone show me how to use a calculator for this