Solve 2x2 + 3x – 7 = x2 + 5x + 39 for x.

a. x=-6 + or - the square root of 82
b. x=-6 + or - 2 with the square root of 17
c. x=1 +or - the square root of 33
d. x= 1 + or - the square root of 47

for this case we have the following expression:

to solve, we rewrite the expression as:

we apply double c and we have:

thus, the quotient is 48.

so, patel found a wrong ratio and the multiplication was incorrect.

option d