Question

(8ab-3xy)+(-4ab-15xy)
-(8a+5b+3c-6d- (a+b+c+d)
(1/2x+y)-(-1/4x-y)
-(-0.5x + 0.75y) + (0.25x+0.25y)
plis ayuda, si no sabes no repondas

Answer 1

Respuesta:

(8ab-3xy)+(-4ab-15xy)

$=8ab-3xy-4ab-15xy\\=8ab-4ab-3xy-15xy\\=4ab-3xy-15xy\\=4ab-18xy$

-(8a+5b+3c-6d- (a+b+c+d)

$=-\left(7a+4b+2c-7d\right)\\=-\left(7a\right)-\left(4b\right)-\left(2c\right)-\left(-7d\right)\\=-7a-4b-2c+7d$

(1/2x+y)-(-1/4x-y)

$=\frac{1}{2x+y}-\frac{-1}{4x-y}\\=\frac{1}{2x+y}-\left(-\frac{1}{4x-y}\right)\\=\frac{1}{2x+y}+\frac{1}{4x-y}$

-(-0.5x + 0.75y) + (0.25x+0.25y)

$=-\left(-0.5x+0.75y\right)+0.25x+0.25y\\=0.5x-0.75y+0.25x+0.25y\\=0.75x-0.5y$