1.请你自己设计一道多项式因式分解的题,先提公因式再用平方差公式分解
2.已知矩形的周长24,设它的一边长为x,那么面积y与x之间的函数是( ).什么事常量,变量有( ) 这是什么函数?
人气:253 ℃ 时间:2019-11-22 16:40:51
解答
1.如: ab2-ac2
=a(b2-c2)
=a(b+c)(b-c)注:"2"代表平方
2.函数为:y=x2
变量为:x
无常量
此函数是二次函数
注:“2”代表平方
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