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2x-1/ x-1 = 4x+1/2x+1
(4x+1)(x-1)=(2x-1)(2x+1) >>> proporcje
4x^2-4x+x-1 = (2x)^2-1 >>> wzór sk. mnożenia (a+b)(a-b) =a^2-b^2
-3x=0 >>>> po skroceniu
x=0
e)
(3x+2)(3x-2)=(2x-1)(4,5x)
9x^2-4= 9x^2-4,5x
4,5x=4 // : 4,5
x= 4/4,5
x=4/9/2
x=8/9
d)
x^2-9=(x+5)(x-1)
x^2-9=x^2-x+5x-5
4x=-4
x=-1
f)
16x^2-25=(2x+3)(8x-7)
16x^2-25=16x^2-14x+24x-21
20x=-4
x=-4/20
x=-1/5
6,43
c)
(x-2)^2/x-2=x-2
x^2-4x+4/x-2=x-2//*(x-2)
x^2-4x+4=(x-2)(x-2)
x^2-4x+4=x^2-2x-2x+4
0=0
e)
x/x^2+3=2//*(x^2+3)
x=2x^2+6
x-2x^2=6
x(1-2x)=6//:(1-2x)
x=6/1-2x
f)
3/x^2-4=1
3=x^2-4
x^2=7
x=V7