Rozwiąż równanie:
a) x(x-5)=2x(x-1)
b) 2(1-5x)=(1-x)2
c)
d)
a)x^2-5x=2x^2-2x
-x^2-3x=0
-x(x+3)=0
x=0 lub x=-3
b)2-10x=2-2x
0=8x
x=0
c)2x^2+8=5-5x
2x^2+5x+3=0
delta 25-4*2*3=25-24=1
x=-6/4
lub x=-1
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a)x^2-5x=2x^2-2x
-x^2-3x=0
-x(x+3)=0
x=0 lub x=-3
b)2-10x=2-2x
0=8x
x=0
c)2x^2+8=5-5x
2x^2+5x+3=0
delta 25-4*2*3=25-24=1
x=-6/4
lub x=-1