(a-b-5)X(a-b+5)=39
(a-b)^2-25=39
(a-b)^2=16
a-b=+4或-4(a-b)^3+2
當(dāng)a-b=4時,
(a-b)^3+2=64+2=66
當(dāng)a-b=-4時,
(a-b)^3+2=-64+2=-62錯了,不好意思·。
(a-b)^2-25=39
(a-b)^2=64
a-b=+8或-8(a-b)^3+2
當(dāng)a-b=8時,
(a-b)^3+2=512+2=514
當(dāng)a-b=-4時,
(a-b)^3+2=-512+2=-510
已知括號a-b-5乘以括號a減b加5等于三十九求根號a-b的立方+2的值
已知括號a-b-5乘以括號a減b加5等于三十九求根號a-b的立方+2的值
數(shù)學(xué)人氣:682 ℃時間:2020-09-28 21:46:53
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