Question

Найдите корни уравнения 49-4х²=0

Answer 1

4x^2=49
x^2 = 49/4
х = 3,5 и х = -3,5

Answer 2

49 - 4x^2 = 0
7^2 - (2x)^2 = 0
( 7 - 2x)(7 + 2x) = 0
7 - 2x = 0
- 2x = - 7
2x = 7
x = 3,5
7 + 2x = 0
2x = - 7
x = - 3,5
Ответ: x1 = 3,5, x2 = - 3,5.