若|x-3|+(x-2y+1)^2=0,则x+y= 若2a-b的值为1,则1-4a+2b的值为(
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若|x-3|+(x-2y+1)^2=0,则x+y=若2a-b的值为1,则1-4a+2b的值为(若|x-3|+(x-2y+1)^2=0,则x+y=若2a-b的值为1,则1-4a+2b的值为(若|x-3|
若|x-3|+(x-2y+1)^2=0,则x+y= 若2a-b的值为1,则1-4a+2b的值为(
若|x-3|+(x-2y+1)^2=0,则x+y= 若2a-b的值为1,则1-4a+2b的值为(
若|x-3|+(x-2y+1)^2=0,则x+y= 若2a-b的值为1,则1-4a+2b的值为(
|x-3|+(x-2y+1)^2=0中绝对值和小括号的平方出来的的数字都是大于等于0的数字,要想最后结果等于0,则这两项都要等于0,所以|x-3|=0,x=3,(x-2y+1)^2=0,y=2 ∴x+y=5
2a-b=1,1-4a+2b=1-(4a-2b)=1-2(2a-b)=1-2=-1
若|x-3|+(x-2y+1)^2=0,则x+y= 5
x-3=0
x-2y+1=0
x=3
y=2
∴x+y=5
若2a-b的值为1,则1-4a+2b的值为( -1)
1-4a+2b=1-2(2a-b)=1-2=-1
1
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