Question

6 * х + 5 *(х-2)=3х(х-2) ; 3*х+8*(х-5)=2х*(х-5)

Answer 1

6 * х + 5 *(х-2)=3х(х-2)

6x+5x-10=3x²-6x

3x²-17x+10=0

D=289-120=169

$x_1=\frac{17+13}{6}=5$

$x_1=\frac{17-13}{6}=\frac{2}{3}$

 

 

3*х+8*(х-5)=2х*(х-5)

3x+8x-40=2x²-10x

2x²-21x+40=0

D=441-320=121

$x_1=\frac{21+11}{4}=8$

$x_1=\frac{21-11}{4}=2,5$

 

Answer 2

6x+5x-10=3x^2-6x

 17x-3x^2

x=5