ա) (x-1)(x-2)=0
[x=1
[x=2
բ) (x-3)(x+4)=0
[x=3
[x= -4
գ) (x-7)^2=0
x=7
դ) (x+4)(x-6)=0
[x= -4
[x=6
ե) x(x-2)=0
[x=0
[x=2
զ) (x+3)x=0
[x= -3
[x=0
է) 3x^2=0
x=0
ը) -x^2(3+x)=0
[ x=0
[x= -3
ա)x*(2x-3)=0
[x=0
[x= 1.5
բ)x*(7x+5)=0
[x=0
[x= -5/7
գ)
x*(x^2-1)=0
[ x=0
[x=1
[x= -1
դ)x^2*(1+x)=0
[x=0
[x= -1
ե)1-x^3=0
x^3=1
x=1
զ)1+x^3=0
x^3= -1
x= -1
է) x^3-8=0
x^3=8
x=2
ը) 125-x^3=0
x^3 = 125
x=5
227.
ա)
(3x+3)(2x+5)=0
[3x+3=0 [x=-1
[2x+5=0 [x=-2.5
3x+3=0
3x=-3
x=-1
2x+5=0
2x=-5
x=-2.5
բ)
(3x-7)(4-3x)=0
[3x-7=0 [x=02 1/3
[4-3x=0 [x=4/3
3x-7=0
3x=7
x=7/3
4-3x=0
-3x=-4
x=-4/-3
x=4/3
թ)
(x2+2x+1)(x2+4x-3)=0
[x2+2x+1 [x=-1
[x2+4x-3 [x=-4-√28/2;-4+√28/2
x2+2x+1=0
D=4-4=0
x=-2/2=-1
x2+4x-3=0
D=16-4*-3=16+12=28
x1=-4-√28/2
x2=-4+√28/2
ժ)
(x2-3x+1)(x2-4x+4)=0
[x2-3x+1=0 [x=3-√5/2;3+√5/2
[x2-4x+4=0 [x=2
x2-3x+1=0
D=9-4=5
x1=3-√5/2
x2=3+√5/2
x2-4x+4=0
D=16-4*4=0
x=4/2=2
ի)
(x2-3x+1)(x2+4x-3)=0
[x2-3x+1=0 [3-√5/2;3+√5/2
[x2+4x-3=0 [-4-√28/2;-4+√28/2
x2-3x+1=0
D=9-4*1=5=√5
x1=3-√5/2
x2=3+√5/2
x2+4x-3=0
D=16+12=28=√28
x1=-4-√28/2
x2=-4+√28/2
լ)
(x2-5x+1)(x2-x+6)=0
[x2-5x+1=0 [5-√21/2;5+√21/2
[x2-x+6=0 [O
x2-5x+1=0
D=25-4*1=21=√21
x1=5-√21/2
x2=5+√21/2
x2-x+6=0
D=1-4*6=O
խ)
(x2+1)(x2-2x+7)=0
[x2+1=0 [O
[x2-2x+7=0 [O
x2+1=0
x2=-1
x2-2x+7=0
D=4-4*7=O
ծ)
(x2-3)(x2-4x+4)=0
[x2-3=0 [+-√3
[x2-4x+4=0 [ 2
x2-3=0
x2=3
x=+-√3
x2-4x+4=0
D=16-4*4=0
x=4/2=2
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