Question

Giúp mình với, mình đang cần gấp

a) 3x(x+2y)-9(x+2y)

b) 5x^2. (x-a)+10x(a-x)

Answer 1

a: \(=3\left(x+2y\right)\left(x-3\right)\)

b: \(=5x^2\left(x-a\right)-10x\left(x-a\right)\)

\(=5x\left(x-\right)\left(x-2\right)\)

Answer 2

a) 3x(x+2y) - 9(x+2y)
= (3x-9)(x+2y)
b) 5x^2. (x-a) +10x(a-x)
= 5x^2 (x-a) -10x(x-a)
=(x-a).5x(x-2)