Question

2x2 + 8x = 10 is equivalent to which of the following?

A. ( x + 2)²=9
B. (2x + 4)²= 10
C. (x + 4)²= 10
D. (x+ 8)²= 18​

Answer 1

A. ( x + 2)²=9

Explanation:

2x2 + 8x = 10 equivalent to :

x²+4x =5 ....(divid by2)

(x²+4x+4 ) - 4=5

(x +2)² - 4 = 5

(x +2)² =9...(add 4)