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

The solution to the problem is as follows:

(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

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B. because the 7 represents "seven times", x represents "a number", 12 represents "plus twelve", and -4 represents "minus four"