Question

cuanto es m²- 2m²- 7m²

Answer 1

$= - 8 {m}^{2}$

Explicación paso a paso:

${m}^{2} - 2 {m}^{2} - 7 {m}^{2} = \\ {m}^{2} - 9 {m}^{2} = - 8 {m}^{2}$