化简:(1)(3x-1)-(2-5x)(2)8p²-7q+6q-7p²-7求值“:(3)6x+2x²-3x+x²+1,其中x=-5

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化简:(1)(3x-1)-(2-5x)(2)8p²-7q+6q-7p²-7求值“:(3)6x+2x²-3x+x²+1,其中x=-5
化简:(1)(3x-1)-(2-5x)(2)8p²-7q+6q-7p²-7
求值“:(3)6x+2x²-3x+x²+1,其中x=-5

化简:(1)(3x-1)-(2-5x)(2)8p²-7q+6q-7p²-7求值“:(3)6x+2x²-3x+x²+1,其中x=-5

(3x-1)-(2-5x)
=3x-1-2+5x
=8x-3

8p²-7q+6q-7p²-7
=p²-q-7

6x+2x²-3x+x²+1
=3x²+3x+1
其中x=-5
原式
=75-15+1
=61

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