Question

Phan tich da thuc thanh nhan tu

Answer 1

a)\(3\left(x-1\right)+5x\left(x-1\right)\)

\(=\left(5x+3\right)\left(x-1\right)\)

b)\(a^2-b^2-4a+4b\)

\(=\left(a-b\right)\left(a+b\right)-\left(4a-4b\right)\)

\(=\left(a-b\right)\left(a+b\right)-4\left(a-b\right)\)

\(=\left(a-b\right)\left(a+b-4\right)\)

c)\(2x^2+5x-3\)

\(=2x^2-x+6x-3\)

\(=x\left(2x-1\right)+3\left(2x-1\right)\)

\(=\left(x+3\right)\left(2x-1\right)\)