ПОМОГИТЕ ! х^2-54=-3х -4\3 х^2+27=0

Question

ПОМОГИТЕ !
х^2-54=-3х
-4\3 х^2+27=0

Answer 1

X^2 - 54 = - 3x
x^2 + 3x - 54 = 0
D = b^2 - 4ac = 9 + 216 = 225 = 15^2
x1= ( - 3 + 15) / 2 = 6
x2 = ( - 3 - 15) / 2 = - 9

- 4/3x^2 = - 27
x^2 = 81/4
x1 = 9/2 = 4,5
x2 = - 9/2 = - 4,5