Question

Give the values of a, b, and c needed to write the equation's general form.
(5 + x)(5 - x) = 7
A = 1; B = 0; C = -18
A = 25; B = 0; C = -1
A = -1; B = 0; C = 25

Answer 1

(5+x)(5-x) = 7
You know that
(a+b)(a-b)=a^2 - b^2

So, 25 - x^2 = 7

(or) -x^2 + 18 = 0
(or) x^2 - 18 = 0

So, A=1, B=0 and C= -18