帮我算一道数学计算,
问题描述：
帮我算一道数学计算,
6X（5X-12）=216
X=?
答
X(5X-12)=36
5X²-12X=36
X²-(12/5)X=36/5
X²-(12/5)X+36/25=36/5+36/25=216/25
(X-6/5)²=(±6√6/5)²
X-6/5=±6√6/5
X1=(6+6√6)/5,X2=(6-6√6)/5