(1):已知(3b-2)²+丨2a-b-3丨=0,求5(2a-b)-2(6a-2b+4)+(4a-3b-2)的值 .(2):若a-b=4,ab=1,求(-2ab+2a+3b)-(3ab+2b-2a)-(a+4b+ab)的值 .亲爱的好心盆友会做的请教下了 ,
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![(1):已知(3b-2)²+丨2a-b-3丨=0,求5(2a-b)-2(6a-2b+4)+(4a-3b-2)的值 .(2):若a-b=4,ab=1,求(-2ab+2a+3b)-(3ab+2b-2a)-(a+4b+ab)的值 .亲爱的好心盆友会做的请教下了 ,](/uploads/image/z/3745678-22-8.jpg?t=%EF%BC%881%EF%BC%89%EF%BC%9A%E5%B7%B2%E7%9F%A5%EF%BC%883b-2%EF%BC%89%26%23178%3B%2B%E4%B8%A82a-b-3%E4%B8%A8%3D0%2C%E6%B1%825%EF%BC%882a-b%EF%BC%89-2%EF%BC%886a-2b%2B4%EF%BC%89%2B%EF%BC%884a-3b-2%EF%BC%89%E7%9A%84%E5%80%BC+.%EF%BC%882%EF%BC%89%EF%BC%9A%E8%8B%A5a-b%3D4%2Cab%3D1%2C%E6%B1%82%EF%BC%88-2ab%2B2a%2B3b%EF%BC%89-%EF%BC%883ab%2B2b-2a%EF%BC%89-%EF%BC%88a%2B4b%2Bab%EF%BC%89%E7%9A%84%E5%80%BC+.%E4%BA%B2%E7%88%B1%E7%9A%84%E5%A5%BD%E5%BF%83%E7%9B%86%E5%8F%8B%E4%BC%9A%E5%81%9A%E7%9A%84%E8%AF%B7%E6%95%99%E4%B8%8B%E4%BA%86+%2C)
(1):已知(3b-2)²+丨2a-b-3丨=0,求5(2a-b)-2(6a-2b+4)+(4a-3b-2)的值 .(2):若a-b=4,ab=1,求(-2ab+2a+3b)-(3ab+2b-2a)-(a+4b+ab)的值 .亲爱的好心盆友会做的请教下了 ,
(1):已知(3b-2)²+丨2a-b-3丨=0,求5(2a-b)-2(6a-2b+4)+(4a-3b-2)的值 .
(2):若a-b=4,ab=1,求(-2ab+2a+3b)-(3ab+2b-2a)-(a+4b+ab)的值 .
亲爱的好心盆友会做的请教下了 ,
(1):已知(3b-2)²+丨2a-b-3丨=0,求5(2a-b)-2(6a-2b+4)+(4a-3b-2)的值 .(2):若a-b=4,ab=1,求(-2ab+2a+3b)-(3ab+2b-2a)-(a+4b+ab)的值 .亲爱的好心盆友会做的请教下了 ,
.1、根据题意得方程组:
3b-2=0
2a-b-3=0
解得:a=11/6,b=2/3,
∴5(2a-b)-2(6a-2b+4)+(4a-3b-2)
=10a-5b-12a+4b-8+4a-3b-2
=2a-4b-2
=11/3+8/3-2=13/3,
2、(-2ab+2a+3b)-(3ab+2b-2a)-(a+4b+ab)
=-2ab+2a+3b-3ab-2b+2a-a-4b-ab
=-6ab+3(a-b)
=-6+12
=6
(1): 已知(3b-2)²+丨2a-b-3丨=0,所以 b=2/3 , a= 11/6
5(2a-b)-2(6a-2b+4)+(4a-3b-2)=2a-4b-10=-9
(2):a-b=4,ab=1,
(-2ab+2a+3b)-(3ab+2b-2a)-(a+4b+ab)=3a-3b-6ab=12-6=6
1. 由于 两项均大于等于零,所以 3b=2 2a-b=3 式子化简为15-(8a-b+10)=5-(6a+2a-b)=5-11-3=-9
2. 式子化简为-6ab+3(a-b)=-6+12=6
.1、根据题意得方程组:
3b-2=0
2a-b-3=0
解得:a=11/6,b=2/3,
∴5(2a-b)-2(6a-2b+4)+(4a-3b-2)
=10a-5b-12a+4b-8+4a-3b-2
=2a-4b-2
=11/3+8/3-2=13/3,
2、(-2ab+2a+3b)-(3ab+2b-2a)-(a+4b+ab)
=-2ab+2a+3b-3ab-2b+2a-a-4b-ab
=-6ab+3(a-b)
=-6+12
=6