-1000x^+81000x-1260000如何配平方数学
问题描述:
-1000x^+81000x-1260000如何配平方数学
答
-1000x²+81000x-1260000=-1000(x²-81x+1260)=-1000[x²-81x+(81/2)²-(81/2)²+1260]=-1000[(x-81/2)²-5301/4]=-1000(x-81/2)²+1325250