Question

desenvolva a) (x-7)2 b) (2x+6)2 c) (4x+7).(4x-7) d) (3x+2)3

Answer 1

$(x - 7)2 \\ 2x - 14 = 0 \\ 2x = 14 \\ x = \frac{14}{7 } \\ x = 7$
$(3x + 2)3 = 0 \\ 9x + 6 = 0 \\ 9x = - 6 \\ x = \frac{ - 6}{9} \\ x = \frac{ - 2}{3}$