Question

Решите уравнение:
25y² - 49 = 0

Answer 1

$25y^2-49=0 \ (5y)^2-7^2=0 \ (5y-7)(5y+7)=0 \ y_{1}= frac{7}{5} \ y_{2}=- frac{7}{5}$

Answer 2

25у^2=49
y^2=49/25
y^2=1.96
y= корень из 1,96