问题
计算题
已知25（x﹣1）2=16，求x的值．
答案
解：∵25（x﹣1）2=16，
∴（x﹣1）2=
，
∴x﹣1=±
=±
，
∴x=1±
，即x=
或x=
．
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已知25（x﹣1）2=16，求x的值．
解：∵25（x﹣1）2=16，
∴（x﹣1）2=，
∴x﹣1=±=±，
∴x=1±，即x=或x=．
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