Question

Решите уравнение
(3х-2)(3х+2)+(4х-5)^2=10х+21

Answer 1

9x^2 - 4 + 16x^2 - 40x + 25 - 10x - 21 = 0

25x^2 - 50x = 0

25x(x - 2) = 0

x = 0;2

Answer 2

9х^2 - 4 + 16х^2 - 40х + 25 - 10х - 21 = 0
25х^2 - 50х = 0 |:5
5х^2 - 10х = 0
5х(х - 2) = 0
5х = 0 или х - 2 = 0
х = 0 или х = 2
Ответ: 0; 2