Question

M=(x+3) - (x - 3)2 - 12x+5​

Answer 1

Explicación paso a paso:

$M=\left(x+3\right)-\left(x-3\right)\cdot \:2-12x+5\\\\\\M=x+3-\left(x-3\right)\cdot \:2-12x+5\\\\\\M=x+3-2\left(x-3\right)-12x+5\\\\\\M=x+3-2x+6-12x+5\\\\\\Rpta\:\:\:M=-13x+14$