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> (1)求下列各式中的x,①(x-1)3=-8;②(x+1)2=25;(2)已知某数的平方根是a+3和2a-15,b的立方根是2,求b-a的平方根。-八年级数学
(1)求下列各式中的x,①(x-1)3=-8;②(x+1)2=25;(2)已知某数的平方根是a+3和2a-15,b的立方根是2,求b-a的平方根。-八年级数学
题目简介
(1)求下列各式中的x,①(x-1)3=-8;②(x+1)2=25;(2)已知某数的平方根是a+3和2a-15,b的立方根是2,求b-a的平方根。-八年级数学
题目详情
(1)求下列各式中的x,
①(x-1)
3
=-8;
②(x+1)
2
=25;
(2)已知某数的平方根是a+3和2a-15,b的立方根是2,求b-a的平方根。
题型:计算题
难度:中档
来源:月考题
答案
解:(1)①x=-1;
②x=4或x=-6;
(2)±2。
上一篇 :
如果一个正数的平方根是a+3和2
下一篇 :
平方根和立方根都是本身的数是
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题目简介
(1)求下列各式中的x,①(x-1)3=-8;②(x+1)2=25;(2)已知某数的平方根是a+3和2a-15,b的立方根是2,求b-a的平方根。-八年级数学
题目详情
①(x-1)3=-8;
②(x+1)2=25;
(2)已知某数的平方根是a+3和2a-15,b的立方根是2,求b-a的平方根。
答案
②x=4或x=-6;
(2)±2。