a. 5(a + b)
b. a(2 + a)
c. 8(9x + y)
d. (x - 5)(x - y)
f. (16x2 - 10y)(x - y)
\(a,=5\left(a+b\right)\\ b,=a\left(a+2\right)\\ c,=8\left(9x+y\right)\\ d,=\left(x-y\right)\left(x-5\right)\\ e,=\left(x+4\right)\left[3xy-6x\left(x+4\right)\right]\\ =\left(x+4\right)\left(3xy-6x^2-24x\right)\\ f,=\left(x-y\right)\left(16x^2-10y\right)=2\left(8x^2-5y\right)\left(x-y\right)\)
\(a)5a+5b=5(a+b)\\b)a^2+2a=a(a+2)\\c)72x+8y=8(9x+y)\\d)x(x-y)-5(x-y)=(x-5)(x-y)\\e)3xy(x+4)-6x(x+4)^2=3x(x+4)(y-2x-8)\\f)16x^2(x-y)-10y(y-x)=16x^2(x-y)-10y(x-y)=(16x^2-10y)(x-y)=2(8x^2-5y)(x-y)\)
