Question

phân tích các đa thức sau thánh phân tử

a) 10x (x-y) - 6y (y-x)

b) x^{2 _} 25- 2xy +y²

C) x^{2 _} 5x +5y - y²

D) x^{2 +} 4x +3

E) x^{2 _} 4x -5

mấy bn giải giùm mk vs nak mơm nhìu

Answer 1

a) 10x(x-y)-6y(y-x)=10x(x-y)+6y(x-y)=(10x+6y)(x-y)

b) \(x^2-25-2xy+y^2=x^2-2xy+y^2-25=\left(x-y\right)^2-25\)

\(=\left(x-y+5\right)\left(x-y-5\right)\)

c) \(x^2-5x+5y-y^2=\left(x^2-y^2\right)-\left(5x-5y\right)\)

\(=\left(x-y\right)\left(x+y\right)-5\left(x-y\right)=\left(x+y-5\right)\left(x-y\right)\)

d)\(x^2+4x+3=x^2+x+3x+3=x\left(x+1\right)+3\left(x+1\right)\)\(=\left(x+3\right)\left(x+1\right)\)

e)\(x^2-4x-5=x^2-5x+x-5=x\left(x-5\right)+\left(x-5\right)\)\(=\left(x+1\right)\left(x-5\right)\)

Answer 2

dễ quá

Answer 3

dễ vậy mà ko làm đc ah bn