Question

efetua e reduza os termos semelhantes​

Answer 1

$d) \: - m \times ( {m}^{2} - 2m) \\ - m \times {m}^{2} - m \times ( - 2m) \\ { - m}^{3} + {2m}^{2}$

$e) \: (x - 2) \times (x + 1) \\ x \times x + x - 2x - 2 \\ {x}^{2} + x - 2x - 2$

$f) \: (2x + 3) \times (x - 3) \\ 2x \times x - 2x \times 3 + 3x - 3 \times 3 \\ 2 {x}^{2} - 6x + 3x - 9 \\ {2x}^{2} - 3x - 9$