PILNE dam naj
Wykonaj działania na ułamkach ( / to kreska ułamkowa)
A) x – 1 / 4 + 2x – 3 / 4
b) 2( x – 3) / 5 – 3(x + 2) / 5
c) (x – 1)(x + 1) / 3 + (2x – 3)^2 / 3
d) (2x – 1)(2x + 1) / 2 – (3x + 2)^2 / 2
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A) x – 1 / 4 + 2x – 3 / 4=3x-1
b) 2( x – 3) / 5 – 3(x + 2) / 5=-x-12/5
c) (x – 1)(x + 1) / 3 + (2x – 3)^2 / 3=x^2+1/3+4x^2+9-12x/3=5x^2-12x+10/3
d) (2x – 1)(2x + 1) / 2 – (3x + 2)^2 / 2=4x^2-1/2-9x^2+4+12x/2=-5x^2-12x-5/2