Question

a) 3(x - y) -5x(y - x)   b) \(\dfrac{2}{5}x\left(y-1\right)+\dfrac{2}{5}y\left(1-y\right)\)

c) x(x - 1) -y (1 - x)    d) 7x(5x - y) + 2(5x - y) - 3y(y - 5x)

e) 2y(3 - x) + 3xy(x - 3)

giúp tu❗

Answer 1

a: \(=\left(x-y\right)\left(5x+3\right)\)

b: \(=\dfrac{2}{5}\left(y-1\right)\left(x-y\right)\)

c: \(=\left(x-1\right)\left(x+y\right)\)

d: \(=\left(5x-y\right)\cdot\left(7x+2+3y\right)\)

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

Answer 2

a) = 3x-3y - 5xy +2x^2

b) = 2/5xy - 2/5x + 2/5y - 2/5y^2

c) =x^2-1-y+xy

d) = 35x^2 - 7xy+10x-2y-3y^2+15xy

= 32x^2-8xy+10x-2y

e) = 6y-2xy+3x^2y-9xy

= 3x^2y-11xy+6y