2x²+x-2值为3,那么4x²+2x+1为多少?
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2x²+x-2值为3,那么4x²+2x+1为多少?
2x²+x-2值为3,那么4x²+2x+1为多少?
2x²+x-2值为3,那么4x²+2x+1为多少?
2x²+x-2=3
2x²+x=54x²+2x=2(2x²+x)=2X5=104x²+2x+1=10+1=11
11
2x²+x-2=3==(X+1)(2X-1)=4 4x²+2x+1=2(X+1)(2X-1)+3=11
11