Question

Разложите на множители;
4-y²
b²-c²
4a²-25
25x²-y2

Answer 1

$4 - {y}^{2} = (2 - y)(2 + y)$

${b}^{2} - {c}^{2} = (b - c)(b + c)$

$4 {a}^{2} - 25 = (2a - 5)(2a + 5)$

$25 {x}^{2} - {y}^{2} = (5x - y)(5x + y)$