四道计算题:100x²=121.x³=-1/216 27x³-125=0 3(x+5)³=-375
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![四道计算题:100x²=121.x³=-1/216 27x³-125=0 3(x+5)³=-375](/uploads/image/z/99363-3-3.jpg?t=%E5%9B%9B%E9%81%93%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%9A100x%26%23178%3B%3D121.x%26%23179%3B%3D-1%2F216+27x%26%23179%3B-125%3D0+3%28x%2B5%29%26%23179%3B%3D-375)
四道计算题:100x²=121.x³=-1/216 27x³-125=0 3(x+5)³=-375
四道计算题:100x²=121.x³=-1/216 27x³-125=0 3(x+5)³=-375
四道计算题:100x²=121.x³=-1/216 27x³-125=0 3(x+5)³=-375
100x²=121,x²=121/100,x=+-11/10
x³=-1/216 ,x=-1/6
27x³-125=0,x³=125/27,x=5/3
3(x+5)³=-375 ,(x+5)³=-125,x+5=-5,x=-10
解题:
(1) 100x²=121 x=±1.1
(2) x³=-1/216 x=-1/6
(3)27x³-125=0 x=5/3
(4)3(x+5)³=-375 x=-10