b: \(=\left(x-6\right)^2\)c: \(=\left(x-3\right)\left(2x+5\right)-\left(x-3\right)\left(x-2\right)\)\(=\left(x-3\right)\left(2x+5-x+2\right)\)\(=\left(x-3\right)\left(x+7\right)\)d: \(=\left(3x-5\right)^2\)Câu trả lời: b: \(=\left(x-6\right)^2\)c: \(=\left(x-3\right)\left(2x+5\right)-\left(x-3\right)\left(x-2\right)\)\(=\left(x-3\right)\left(2x+5-x+2\right)\)\(=\left(x-3\right)\left(x+7\right)\)d: \(=\left(3x-5\right)^2\)