(1-16a的四次方)/(4a²+1)/(2a+1)
=-(16a的四次方-1)/(4a²+1)(2a+1)
=-(4a²+1)(2a+1)(2a-1)/(4a²+1)(2a+1)
=-(2a-1)
=1-2a
-1/2x²+2x=0
-1/2x(x-4)=0
x=0,x=4
(3a-4)²=25
(3a-4)²-25=0
(3a-4+5)(3a-4-5)=0
3(3a+1)(a-3)=0
a=-1/3,a=3
(1-16a的四次方)/(4a²+1)/(2a+1)
=-(16a的四次方-1)/(4a²+1)(2a+1)
=-(4a²+1)(2a+1)(2a-1)/(4a²+1)(2a+1)
=-(2a-1)
=1-2a
-1/2x²+2x=0
-1/2x(x-4)=0
x=0,x=4
(3a-4)²=25
(3a-4)²-25=0
(3a-4+5)(3a-4-5)=0
3(3a+1)(a-3)=0
a=-1/3,a=3