(2x-7y-8)2+|3x-8y-10|=0
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(2x-7y-8)2+|3x-8y-10|=0(2x-7y-8)2+|3x-8y-10|=0(2x-7y-8)2+|3x-8y-10|=0因为(2x-7y-8)²+|3x-8y-10|=0,
(2x-7y-8)2+|3x-8y-10|=0
(2x-7y-8)2+|3x-8y-10|=0
(2x-7y-8)2+|3x-8y-10|=0
因为(2x-7y-8)²+|3x-8y-10|=0,两个非负数的和为0,这两个非负数都要为0
所以有方程组:
2x-7y-8=0 (1)
3x-8y-10=0 (2)
(2)×7-(1)×8得:
21x-16x-6=0
5x=6
x=1.2 代入(1)得:
2×1.2-7y-8=0
2.4-7y-8=0
7y=-5.6
y=-0.8
所以x=1.2, y=-0.8
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