Question

ax+ay+az=

-ax-bx-cx=

$a^{2}(x-y)-ab(x-y)+b^{2}(x-y)=$

ax+bx-ay-by=

Answer 1

1.ax+ay+az=a(x+y+z)

 

2.-ax-bx-cx=-x(a+b+c)

3.(x-y)(a2-ab+b2)

4.ax+bx-ay-by=x(a+b)-y(a+b)=(a+b)(x-y)