Bài 2:
1: \(=6x^2+14x-15x-35=6x^2-x-35\)
2: \(=-12x^2+15x+8x-10=-12x^2+23x-10\)
3: \(=x^3+3x^2-x-2x^2-6x+2\)
\(=x^3+x^2-7x+2\)
4: \(=2x^3+x^2-2x+6x^2+3x-6\)
\(=2x^3+7x^2+x-6\)
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