Question

1) Resolva as seguintes equações:
a) (2x - 4)2 = 0
b) (x - 5)2 = 1
c) (x - 3)2 = -2x​

Answer 1

$a)(2x - 4)2 = 0 \\ 4x - 8 = 0 \\ 4x = 8 \\ x = \frac{8}{4} \\ x = 2$

$b)(x - 5)2 = 1 \\ 2x - 10 = 1 \\ 2x = 1 + 10 \\ 2x = 11 \\ x = \frac{11}{2} \\ x = 5.5$

$c)(x - 3)2 = - 2x \\ 2x - 6 = - 2x \\ 2x + 2x = 6 \\ 4x = 6 \\ x = \frac{6}{4} \\ x = 1.5$