Question

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

please show steps

Answer 1

What did you get ?

Answer 2

3(x-5) (x+5)= 3x^2-28x + 75

Answer 3

Your expansion is incorrect

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