if x^2-81=19,what is the product of the solutions?我不明白它这里面说的积(product) 是什么.我知道x=-+10,老师说答案是-100.我觉得可能会是100,因为x^2=100.这道题到底怎么得出答案-100的?
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![if x^2-81=19,what is the product of the solutions?我不明白它这里面说的积(product) 是什么.我知道x=-+10,老师说答案是-100.我觉得可能会是100,因为x^2=100.这道题到底怎么得出答案-100的?](/uploads/image/z/11905604-44-4.jpg?t=if+x%5E2-81%3D19%2Cwhat+is+the+product+of+the+solutions%3F%E6%88%91%E4%B8%8D%E6%98%8E%E7%99%BD%E5%AE%83%E8%BF%99%E9%87%8C%E9%9D%A2%E8%AF%B4%E7%9A%84%E7%A7%AF%EF%BC%88product%29+%E6%98%AF%E4%BB%80%E4%B9%88.%E6%88%91%E7%9F%A5%E9%81%93x%3D-%2B10%2C%E8%80%81%E5%B8%88%E8%AF%B4%E7%AD%94%E6%A1%88%E6%98%AF-100.%E6%88%91%E8%A7%89%E5%BE%97%E5%8F%AF%E8%83%BD%E4%BC%9A%E6%98%AF100%2C%E5%9B%A0%E4%B8%BAx%5E2%3D100.%E8%BF%99%E9%81%93%E9%A2%98%E5%88%B0%E5%BA%95%E6%80%8E%E4%B9%88%E5%BE%97%E5%87%BA%E7%AD%94%E6%A1%88-100%E7%9A%84%3F)
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if x^2-81=19,what is the product of the solutions?我不明白它这里面说的积(product) 是什么.我知道x=-+10,老师说答案是-100.我觉得可能会是100,因为x^2=100.这道题到底怎么得出答案-100的?
if x^2-81=19,what is the product of the solutions?
我不明白它这里面说的积(product) 是什么.我知道x=-+10,老师说答案是-100.
我觉得可能会是100,因为x^2=100.这道题到底怎么得出答案-100的?
if x^2-81=19,what is the product of the solutions?我不明白它这里面说的积(product) 是什么.我知道x=-+10,老师说答案是-100.我觉得可能会是100,因为x^2=100.这道题到底怎么得出答案-100的?
乘积嘛~根号100=正负10,那么乘积-10*10=-100
如果是100的话,那么X=10,但是此时只有一个解,无法构成乘积~
希望没错~
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if x^2-81=19,what is the product of the solutions?我不明白它这里面说的积(product) 是什么.我知道x=-+10,老师说答案是-100.我觉得可能会是100,因为x^2=100.这道题到底怎么得出答案-100的?
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