Question

-x的平方+80x+1800怎么变成-10(x-4)的平方+1960

Answer 1

问：-x的平方+80x+1800怎么变成-10(x-4)的平方+1960

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答：是-x²+80x+1800变为-10(x-4)²+1960对吧

答：您确定-10(x-4)²+1960这里是-10吗？

答：您看看哈-10(x-4)²+1960=-10(x²-8x+16)+1960=-10x²+80x-160+1960=-10x²+80x+1800也就是说-10(x-4)²烂手袭薯启+1960=-10x²+80x+1800这个-10x²饥兄+80x+1800≠-x²+80x+1800

答：也就是饥裂说-x²+80x+1800无论经过如何变化，烂液闭埋汪都得不到-10(x-4)²+1960