# algebra

Quadratic equation whose roots are 5 and -5 with coefficient 3
using the letter x to represent the variable

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1. What did you get ?

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posted by Reiny
2. 3(x-5) (x+5)= 3x^2-28x + 75

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posted by tbell

3(x-5)(x+5)
= 3(x^2 - 25)
= 3x^2 - 75

Since you wanted a quadratic equation, it should be

3x^2 - 75 = 0

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posted by Reiny

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