решите уравнение:
4)(1/2-5х)^2+3/4=(5х-4)^2
5)х(х+2)-(х+3)(х-3)=13
6)4х(х-1)-(2х+5)(2х-5)=1
4)(1/2-5х)^2+3/4=(5х-4)^2
5)х(х+2)-(х+3)(х-3)=13
6)4х(х-1)-(2х+5)(2х-5)=1
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Answers & Comments
-24,5х+0,75=-11х
-35,5х=0,75
х=-47,3
2)х2+2х-х2-3х-3х-9=13
-4х=22
-х=5,5
3)4х2-4х-2х2-10х-10х-25-1
2х2+16х-24=0
D=256-192=64
х1=2÷16+8=24÷2=12
х2=2÷16-8=8÷2=4