Question

x是1/2的倒数的相反数,绝对值为3的数是y,且|m/2|+(n+1)平方=0,求x平方-2mn+

Answer 1

X是1/2的倒数的相反数,

x=-2

绝对值是3的数是Y,

y=3,-3

且|M-2|+（N+1）^2=0,

M-2=0,N+1=0

M=2,N=-1

X的平方-2MN+Y

=4+4+3=12

X的平方-2MN+Y

=4+4-3

=5