Решите уравнение к . 15х(х+2)+6х(х-2)=22(х-2)(х+2)

15X^2 + 30X + 6X^2 - 12X = 22*(X^2-4)

21X^2 + 18X = 22X^2 - 88

22X^2 - 21X^2 - 88 - 18X = 0

X^2 - 18X - 88 = 0

D = 324 - 4*1*(-88) = 324 + 352 = 676

V D = 26

X1 = 18 + 26 \ 2 = 22

X2 = 18 - 26 \ 2 = - 8 \ 2 = - 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15х(х+2)+6х(х-2)=22(х-2)(х+2)

15x^2+30x+6x^2-12x=22(x^2-4) 21x^2+18x=22x^2-88 x^2-18x-88=0 (x-22)(x+4)=0 x1=22 x2=-4