Question

0,25y²-25=0 решите уравнение​

Answer 1

$0.25 {y}^{2} - 25 = 0 \\ 0.25 {y}^{2} = 25 \\ {y}^{2} = 25 \div 0.25 \\ {y}^{2} = 100 \\ y = ±10$

Ответ: ±10.