如果负4x的平方加4x加3大于0,那么根号4x平方减12x加9加绝对值2x加1的值为多少?

求解,谢谢各位!
2024-11-22 13:25:58
推荐回答(2个)
回答(1):

-4x²+4x+3>0
4x²-4x-3<0
(2x-3)(2x+1)<0
-1/2√(4x-12x+9)²+l2x+1l
=√(2x-3)²+l2x+1l
=3-2x+2x+1
=4

回答(2):

-4x^2+4x+3 >0
4x^2-4x-3 <0
(2x-3)(2x+1) <0
-1/2√(4x^2-12x+9) + | 2x+1|
=√(3-2x)^2 + | 2x+1|
=(3-2x) + (2x+1)

=4