Question

pilnee ! rozwiąż i sprawdź równanie: (x-6)*(2x+1)=2x(x-4)+2(x+12)

Answer 1

(x-6)*(2x+1) = 2x*(x-4)+ 2*(x+12)
2x^2 +x-16x-6 = 2x^2 -8x+2x+24
-15x-6 = -6x+24
9x=-30
x= -30/9

x= -3 1/3

 

spr.
2*(-3 1/3)^2+15*(-3 1/3)-6 = 2*(-3 1/3)^2 -6*(-3 1/3)+24
200/9+15*(- 10/3)-6 = 200/9 -6*(-10/3)+24
200/9 +44 = 200/9 +44