计算 2x^2-(3x-1)(1+3x)+5x(x-1)
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计算2x^2-(3x-1)(1+3x)+5x(x-1)计算2x^2-(3x-1)(1+3x)+5x(x-1)计算2x^2-(3x-1)(1+3x)+5x(x-1)2x^2-(3x-1)(1+3x)+5
计算 2x^2-(3x-1)(1+3x)+5x(x-1)
计算 2x^2-(3x-1)(1+3x)+5x(x-1)
计算 2x^2-(3x-1)(1+3x)+5x(x-1)
2x^2-(3x-1)(1+3x)+5x(x-1)
=2x^2-(9x^2-1)+5x^2-5x
=2x^2-9x^2+1+5x^2-5x
=-2x^2-5x+1
-2X^2-5X+1
2x^2-(3x-1)(1+3x)+5x(x-1)
=2x^2-(9x^2-1)+5x^2-5x
=2x^2-9x^2+1+5x^2-5x
=-2x^2-5x+1
-2x^2-5x+1
解
2x^2-(3x-1)(1+3x)+5x(x-1)
=2x^2-(9x^2-1)+5x^2-5x
=2x^2-9x^2+1+5x^2-5x
=-2x^2-5x+1
2x^2-(3x-1)(1+3x)+5x(x-1)
=2x^2-(9x^2-1)+5x^2-5x
=2x^2-9x^2+1+5x^2-5x
=-2x^2-5x+1
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