a) \(x^3+6x^2+3x-10\)
\(=x^3-x^2+7x^2-7x+10x-10\)
\(=x^2\left(x-1\right)+7x\left(x-1\right)+10\left(x-1\right)\)
\(=\left(x-1\right)\left(x^2+7x+10\right)\)
\(=\left(x-1\right)\left(x^2+2x+5x+10\right)\)
\(=\left(x-1\right)\left(x+2\right)\left(x+5\right)\)
b) \(x^3+3x^2-33x-35\)
\(=x^3-5x^2+8x^2-40x+7x-35\)
\(=x^2\left(x-5\right)+8x\left(x-5\right)+7\left(x-5\right)\)
\(=\left(x-5\right)\left(x^2+8x+7\right)\)
\(=\left(x-5\right)\left(x^2+x+7x+7\right)\)
\(=\left(x-5\right)\left(x+1\right)\left(x+7\right)\)
Đúng 0
Bình luận (0)
c) 2x2(x +1) + 4x(x +1); d) 2 x(y - 1) - 2
