Question

решите 4, 5 умоляяю

Answer 1

4)xy+y^2/15x*3x/x+y=y(x+y)*3x/15x*x+y=y/5 ; 7.5/5=1.5

5)10x/2x-3-5x=10x-10x^2+15x/2x-3=25x-10x^2/2x-3 ; 25*0.5-10*(0.5)^2/2*(0.5)-3=12.5-2.5/1-3=10/-2=-5