Question

c) (x - 3)2 = 5x +9
d) 2x(x + 1) - x(x + 5) = 3(12 - x)​

Answer 1

Explicação passo-a-passo:

c) (x-3).2 =5x +9

2x -6 = 5x +9

2x-5x=9+6

-3x=15

x=15/-3

x= -5

d) 2x(x + 1) - x(x + 5) = 3(12 - x)

2x^2+2x -x^2-5x= 36 -3x

x^2=36

x=6