Rozwiąż rownania stopnia pierwszego z jedna niewiadoma .
a ) 2x ( x - 1 ) = 2x do kwadratu +4
b) 1/2 x (4 - 6x ) - 1/3 x ( 9x - 12 ) = - 2x (3x+1 )
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a ) 2x(x-1)=2x²+4
2x²-2x=2x²+4
2x²-2x²-2x=4
-2x=4 /:(-2)
x=-2
b) ½x(4-6x)-⅓x(9x-12)=-2x(3x+1)
2x-3x²-3x²+4x=-6x²-2x
2x-6x²+6x²+4x+2x=0
8x=0 /:8
x=0