6 * х + 5 *(х-2)=3х(х-2) ;
3*х+8*(х-5)=2х*(х-5)
6x+5x-10=3x^2-6x
17x-3x^2
x=5
6 * х + 5 *(х-2)=3х(х-2)
6x+5x-10=3x²-6x
3x²-17x+10=0
D=289-120=169
3x+8x-40=2x²-10x
2x²-21x+40=0
D=441-320=121