Question

Найдите корни уравнения
9-25x^2=0

Answer 1

9-5x^2=0
-25x^2=-9(делим/умножаем на -1)
25x^2=9
x^2=9/25
x^2=0.36
x=+(-)0.6

Answer 2

9-25x^2=0
-25x^2=-9
-x^2=-9/25
-x^2=-0.36
x=под корнем0.36
х=+ - 0.6