Question

(-15m²-20n²+16)+(+18n²+20-15m²)​

Answer 1

Explicación paso a paso:

$( - 15m {}^{2} - 20n { }^{2} + 16) + (18n {}^{2} + 20 - 15m {}^{2} \\ = - 15m {}^{2} - 20n {}^{2} + 16 + 18n {}^{2} + 20- 15m {}^{2} \\ = - 15m {}^{2} - 15m {}^{2} - 20n {}^{2} + 18n {}^{2} + 16 + 20 \\ = - 30m {}^{2} - 20n {}^{2} + 18n {}^{2} + 16 + 20 \\ = - 30m {}^{2} - 2n {}^{2} + 16 + 20 \\ = 36 - 30m { }^{2} - 2n {}^{2}$