Question

De 20m2 – 8 restar (– m2 + 5).

Answer 1

Explicación paso a paso:

$(20 {m}^{2} - 8) - ( - {m}^{2} + 5)$

$20 {m}^{2} - 8 + {m}^{2} - 5$

$21 {m}^{2} - 13$