若|2x+2y-5|与(2x-5y-16)²互为相反数,求y的x次方,
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若|2x+2y-5|与(2x-5y-16)²互为相反数,求y的x次方,若|2x+2y-5|与(2x-5y-16)²互为相反数,求y的x次方,若|2x+2y-5|与(2x-5y-16
若|2x+2y-5|与(2x-5y-16)²互为相反数,求y的x次方,
若|2x+2y-5|与(2x-5y-16)²互为相反数,求y的x次方,
若|2x+2y-5|与(2x-5y-16)²互为相反数,求y的x次方,
若|2x+2y-5|与(2x-5y-16)²互为相反数,
则|2x+2y-5|=0,(2x-5y-16)²=0
2x+2y-5=0,①
2x-5y-16=0 ②
①-②得:
7y=21
y=3
将y=3代入①得:
2x+6-5=0
x=-1/2
所以x=-1/2,y=3
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很简单的,因为|2x+2y-5|与(2x-5y-16)²互为相反数
所以 |2x+2y-5|+(2x-5y-16)²=0
解连立方程组
2x+2y-5=0
2x-5y-16=0
可求X,Y的值
剩下的不用我说了吧。
还有,题目是否抄错了,你这个题目解出来x=57/14,y=-(11/7)
是否应该是2x-5y+16
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