607

գ)

(3x-8)²-(4x-6)²+(5x-2)(x+2)=24

9x²-48x+64-16x+48x-36+5x²+10x-2x-4

-2x²+8c+24=24

-2x²+8x+24-24=0

-2x²+8x=0

x(-2x+8)=0

[x=0 -2x+8=0>[x=0 2x=8 =>[x=0; x=4

-2x+8x=0

D=64-4*(-2)*(0)=64-0=64

x1=-8-8/-4=4

x2=-8+8/-4=0

Պատ․՝ 0;4

604.

ը)

2/3x²=5x

2/3x²-5x=0

x(2/3x-5)=0 =>[x=0 2/3x-5=0 => [x=0 2/3x-5=0 => [x=0 x=5*3/2 =>[x=0 x=15/2=7 1/2

Պատ․՝ 0; 7 1/2

608.

ը)

2x-3x²/5 — 7x²-x/4 — x²/2 = 0

8x-12x²-35x²-5x-10x²/20

13x-57x²/20=0

-57x²+13x=0 => x(-57x+13)=0 => [x=0 -57x+13=0 => [x=0 57x=13 => [x=0 13/57

Պատ․՝ 0; 13/57