Question

Phân tích thành nhân tử: 9(x-1)²-16(x-2)²

Answer 1

\(9\left(x-1\right)^2-16\left(x-2\right)^2\)

\(=\left(3x-3\right)^2-\left(4x-8\right)^2\)

\(=\left(3x-3-4x+8\right)\left(3x-3+4x-8\right)\)

\(=\left(-x+5\right)\left(7x-11\right)\)