若3(2a-3b)²+2|5b-2c|=0,则a:b:c=?
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若3(2a-3b)²+2|5b-2c|=0,则a:b:c=?
若3(2a-3b)²+2|5b-2c|=0,则a:b:c=?
若3(2a-3b)²+2|5b-2c|=0,则a:b:c=?
3(2a-3b)²≥0 2|5b-2c|≥0
非负数之和为0,则
3(2a-3b)²=0 2|5b-2c|=0
2a-3b=0 5b-2c=0
2a=3b 5b=2c
10a=15b 15b=6c
即10a=15b=6c
a:b:c=3∶2∶5
2a-3b=0 5b-2c=0 a=2b/3 c=5b/2 所以 a:b:c=4:6:15