Question

Give the values of a, b, and c needed to write the equation's standard 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

Here is your answer:

A = 1; B = 0; C = -18

Answer 2

`(5+x)(5-x)=7\\\\\text{use:}\ (a-b)(a+b)=a^2-b^2\\\\5^2-x^2=7\\\\25-x^2=7\ \ \ |-7\\\\18-x^2=0\\\\x^2-18=0`


`Answer:\ \boxed{A=1;\ B=0;\ C=-18}`