求解5x(2x+1)-(2x+3)(5x-1)

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求解5x(2x+1)-(2x+3)(5x-1)

求解5x(2x+1)-(2x+3)(5x-1)
求解5x(2x+1)-(2x+3)(5x-1)

求解5x(2x+1)-(2x+3)(5x-1)
5x(2x+1)-(2x+3)(5x-1)
=10x²+5x-(10x²-2x+15x-3)
=-8x+3

解原式=10x²+5x-[10X²-2x+15x-3]
=10x²+5x-10X²+2x-15x+3
=3-8x

明显有简便算法的
5x(2x+1)-(2x+3)(5x-1)
=5x(2x+1)-(2x+1)(5x-1) -2(5x-1)

=(2x+1)(5x-5x+1)-10x+2
=2x+1-10x+2
=-8x+3