如果a-1/4的绝对值=-(b+3)²,那么代数式2b-(4b-3a)-4a的值等于
问题描述:
如果a-1/4的绝对值=-(b+3)²,那么代数式2b-(4b-3a)-4a的值等于
答
=32\4
答
a-1/4的绝对值=-(b+3)²
则,a=1/4,b=-3
2b-(4b-3a)-4a
=2b-4b+3a-4a
=-2b-a
=6-1/4
=5又4分之3
答
a-1/4的绝对值=-(b+3)²
a-1/4的绝对值+(b+3)²=0
即
a-1/4=0,(b+3)=0
a=1/4,b=-3
所以
2b-(4b-3a)-4a
=-2b-a
=6-1/4
=23/4
答
a-1/4的绝对值=-(b+3)²
则:(a-1/4)的绝对值+(b+3)²=0
则必有:
a-1/4=0
b+3=0
解得:a=1/4;b=-3
2b-(4b-3a)-4a
=2b-4b+3a-4a
=-a-2b
=-1/4+6
=5又3/4