利用分式因解:x·x+7x-18=?m·m-2m-15=?a·a·b·b-7ab+10=?17.32·17.32-17.32·14.64+7.32·7.32

问题描述:

利用分式因解:x·x+7x-18=?m·m-2m-15=?a·a·b·b-7ab+10=?17.32·17.32-17.32·14.64+7.32·7.32
要解题过程(尽量清晰点)和结果,

x·x+7x-18=x²+7x-18=(x+9)(x-2)m·m-2m-15=m²-2m-15=(m-5)(m+3)a·a·b·b-7ab+10=(ab)²-7ab+10=(ab-2)(ab-5)17.32·17.32-17.32·14.64+7.32·7.32=17.32²-2·7.32·17.32+7.32²=(17.32-...