帮我算一道数学计算,6X(5X-12)=216 X=?
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帮我算一道数学计算,
6X(5X-12)=216
X=?
6X(5X-12)=216
X=?
![帮我算一道数学计算,6X(5X-12)=216 X=?](/uploads/image/z/8389861-61-1.jpg?t=%E5%B8%AE%E6%88%91%E7%AE%97%E4%B8%80%E9%81%93%E6%95%B0%E5%AD%A6%E8%AE%A1%E7%AE%97%2C6X%EF%BC%885X-12%EF%BC%89%3D216+X%3D%3F)
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
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
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