Question

Phân tích đa thức thành nhân tử : x^2 – xy(a + b) + aby^2

Answer 1

\(x^2-xy\left(a+b\right)+aby^2=x^2-xya-xyb+aby^2=x\left(x-ya\right)-yb\left(x-ya\right)=\left(x-ya\right)\left(x-yb\right)\)

Answer 2

\(x^2-xy\left(a+b\right)+aby^2\)

\(=x^2-axy-bxy+aby^2\)

\(=x\left(x-ay\right)-by\left(x-ay\right)\)

\(=\left(x-ay\right)\left(x-by\right)\)