Question

2x ( a + b) = - 8x ( m + x) = 5x ( 2a + 7a) = - 3x ( 4 - a) =

Answer 1

Resposta:

$2x ( a + b) =\\\\a\left(b+c\right)=ab+ac\\\\=2xa+2xb\\\\=2ax+2bx$

$- 8x ( m + x) =\\\\=-8xm+\left(-8x\right)x\\\\=-8mx-8xx\\\\=-8mx-8x^2$

$5x ( 2a + 7a) =\\\\=5\cdot \:9ax\\\\=45ax$

$3x ( 4 - a) =\\\\=3x\cdot \:4-3xa\\\\=3\cdot \:4x-3ax\\\\=12x-3ax$