题目内容
化简:
(1)4x2-8x+5-3x2+6x-2;
(2)3x3-(-5x2+3x3)+2(-2x2+x)
(1)4x2-8x+5-3x2+6x-2;
(2)3x3-(-5x2+3x3)+2(-2x2+x)
(1)4x2-8x+5-3x2+6x-2
=(4-3)x2+(-8+6)x+(5-2)
=x2-2x+3;
(2)3x3-(-5x2+3x3)+2(-2x2+x)
=3x3+5x2-3x3-4x2+2x
=(3-3)x3+(5-4)x2+2x
=0+x2+2x
=x2+2x.
=(4-3)x2+(-8+6)x+(5-2)
=x2-2x+3;
(2)3x3-(-5x2+3x3)+2(-2x2+x)
=3x3+5x2-3x3-4x2+2x
=(3-3)x3+(5-4)x2+2x
=0+x2+2x
=x2+2x.
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