rozwiąż równania : a) x-2 x-3 ___ = _____ x+1 x+2 b) 2x-3 4x ____ = ___ x+3 2x+3 c) 2x-5 2(x-2) _____ = ______ 2x +3 2x+5

a) x-2 x-3 ___ = _____ x+1 x+2 (x-2)(x+2)=(x+1)(x-3) x²-2²=x²-3x+x-3 x²+4=x²-3x+x-3 x²-x²+3x+x=-3-4 4x=-7| : 4 x=1,75 b) 2x-3 4x ____ = ___ x+3 2x+3 (2x-3)(2x+3)=(x+3)4x (2x)²-3²=4x²+12x 4x²+9=4x²+12x 4x²-4x²-12x=-9 -12x=-9|:(-12) x=0,75 c) 2x-5 2(x-2) _____ = ______ 2x +3 2x+5 (2x-5)(2x+5)=(2x +3)2(x-2) (2x)²-5²=(2x +3)2x-4 4x²+25=4x²+6x-4 4x²-4x²-6x=-4-25 -6x=-29|:(-6) x≈4,9