Wykonaj mnożenia i zredukuj wyrazy podobne. a)(1\2x-3)(2x-5) b)(3\4x-2)(1\2x-1\4) c)(2\5x-1\4)(1\2x+3\4) d)(2\3x-1\2)(3\5x-2\3)

a)(1/2x-3)*(2x-5) 1/2x+2x=3+5 2 1/2x=8 x=8:2 1/2 x=3 1/5 b)(3/4-2)*(1/2x-1/4) 3/4x+1/2x=2+1/4 3/4x+2/4x=2 1/4 5/4x=9/4 x=9/4:5/4=9/4*4/5 x=9/5=1 4/5 c)(2/5x-1/4)*(1/2x+3/4) 2/5x+1/2x=1/4+3/4 4/10x=5/10x=4/4 9/10x=4/4 x=4/4:9/10=4/4*10/9=20/18=1 2/18=1 1/9 d)(2/3x-1/2)*(3/5x-2/3) 10/15x+9/15x=3/6+4/6 19/15x=7/6 x=7/6:19/15=7/6*15/19=35/38

ale nie wiem czy dobrze ;D

a) (1/2x-3)(2x-5)= x kwadrat-2,5x-6x+15= x kwadrat-8,5x+15 b) (3/4x-2)(1/2x-1/4)= 3/8x kwadrat-3/16x-x+1/2= 3/8x kwadrat-1 i 3/16x+1/2 c) (2/5x-1\4)(1/2x+3/4)= 1/5x kwarat+6/20x-1/8x-3/16= 1/5x kwadrat+0,3x-0,125x-3/16= 1/5x kwadrat+7/40x-3/16 d) (2/3x-1\2)(3/5x-2/3) = 2/5x kwadrat-4/9x-3/10x+1/3= 0,4x kwadrat -40/90-27/90+1/3= 0,4x kwadrat-67/90+1/3