Решите ура-ие: а) 17-x^2=0 7x-8x^2=0

Question

Решите ура-ие:
а) 17-x^2=0
7x-8x^2=0

Answer 1

17 - х^2 = 0
x^2 = 17 - 0
x^2 = 17
 x1 = √17
 x2 = - √17
--------------------------
7x - 8x^2 = 0
8x^2 - 7x = 0
x (8x - 7) = 0
x1 = 0
8x - 7 = 0
8x = 7
x2 = 7/8
Ответ: х1 = 0
            х2 = 7/8