Question

Bài 2:

a) ax - 2x - a² + 2a

b) x² + x - ax - a

c) 2x+ 4ax + x + 2a

d) 2xy - ax + x² - 2ay

e) x³ + ax² + x+a

f) x²y² + y³ + zx² + yz

Answer 1

a/ \(ax-2x-a^2+2a\)

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

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

Vậy....

b/ \(x^2+x-ax-a\)

\(=x\left(x+1\right)-a\left(x+1\right)\)

\(=\left(x+1\right)\left(x-a\right)\)

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d/ \(2xy-ax+x^2-2ay\)

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

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

e/ \(x^3+ax^2+x+a\)

\(=x^2\left(x+a\right)+\left(x+a\right)\)

\(=\left(x^2+1\right)\left(x+a\right)\)

Vậy...