Question

Thu gọn:

(x-1)^2 - (x+2)(x-2)

4x(x-3) -3x(2+x)

2x(5x+2) + (2x-3)(3x-1)

Answer 1

Thu gọn:

(x-1)^2 - (x+2)(x-2)

4x(x-3) -3x(2+x)

2x(5x+2) + (2x-3)(3x-1)

Answer 2

\(\left(x-1\right)^2-\left(x+2\right)\left(x-2\right)\)

\(=x^2-2x+1-x^2+4\)

\(=-2x+5\)

\(4x\left(x-3\right)-3x\left(2+x\right)\)

\(=4x^2-12x-6x-3x^2\)

\(=x^2-18x\)

\(2x\left(5x+2\right)+\left(2x-3\right)\left(3x-1\right)\)

\(=10x^2+4x+6x^2-11x+3\)

\(=16x^2-7x+3\)