Решить;

1) 4y-5=9y-2

2) (9-x) ^2 (2x-1) (x+1) = 0/

3) x (x-3) = 2 (x-3)

1.4y-9y=-2+5. - 5y=3. y=-0.6

2. (9-x) 2=0. или. (2x-1) * (x+1) = 0

x2-18x+81=0. D=1-4*2 * (-1) = 9

D=324-4*81=0. x1 = - 1+3/4=-0.5

x=18. x2 = - 1-3/4=-1

3. x2-3x=2x-6

x2-5x=-6

x (x-5) = - 6

x=-6. и. x-5=0

x=5

1) 4y-5=9y-2

4y-9y=-2+5

-5y=3

y=-3/5

2) (9-x) ^2 (2x-1) (x+1) = 0

(9-x) ^2=0 или 2x-1=0 или x+1=0

x=9 x=1/2 x=-1

3) x (x-3) = 2 (x-3)

x^2-3x=2x-6

x^2-3x-2x+6=0

x^2-5x+6=0

D = (-5) ^2-4*1*6=25-24=1

x1 = (5+1) / 2 = 3

x2 = (5-1) / 2 = 2