Question

Rút gọn đa thức

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

Answer 1

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

\(=4x^2+12x+9+4x^2-12x+9-2\left(2x-1\right)^2\)

\(=8x^2+18-2\left(4x^2-4x+1\right)\)

\(=8x^2+18-8x^2+8x-2=8x+16\)