Lebronbryan433viz
Answered

Solve this please 8x(squared) +16x = 42

Sagot :

Doraemon101viz
8x^2 + 16x = 42
8x^2 + 16x - 42 = 0
4x^2 + 8x - 21 + 0
(2x + 7) (2x - 3) = 0

equate to zero :
2x + 7 = 0
      2x = 7
        x = - 7/2

2x - 3  = 0
      2x = 3
       x = 3/2
8x^2+16x=42
8x^2+16x-42=0
(4x-6)(2x+7)