Question

sabendo que a+b=25 e a²-b²=100 calcule a-b

Answer 1

Olá

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

$(a + b)(a - b) = 100$

$25.(a - b) = 100$

$a - b =\dfrac{100}{25}$

$a - b = 4$