Question

The equation which correctly represents this situation is

A) x2 = 306
B) 2x2 = 306
C) x2 + x = 306
D) 2x2 + x = 306

Answer 1

C) x2 + x = 306

Explanation:

x2 + x = 306

x2 + x - 306 = 0

x2 + 18x - 17x + 18 * (-17) = 0

x ( x + 18) - 17 (x +18) =0

(x + 18) (x - 17 ) = 0

x = -18 or 17