b) 2x^2 + 7x - 15
2x^2 + 10x - 3x -15
2x(x+5) - 3(x+5)
(x+5)(2x-3)
a, 5x^3y - 10x^2y^2 + 5xy^3 = 5xy. ( x^2 - 2xy + y^2) = 5xy.( x-y)^2
b, 2x^2 + 7x -15 = 2x^2 + 10X - 3x -15
= 2x( x+5) - 3( x+5)
= ( 2x-3) (x+5)
a)
\(5xy\left(x^2-2xy+y^2\right)=5xy\left(x-y\right)^2\)
b)
\(x\left(2x-3\right)+5\left(2x-3\right)=\left(2x-3\right)\left(x+5\right)\)