Question

daca a²-b²=40 si a-b=4.Atunci a+b este egal cu

Answer 1

${a}^{2} - {b}^{2} = 40$

$a - b = 4$

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

$(a - b)(a + b) = 40$

$4(a + b) = 40$

$a + b = \frac{40}{4}$

$a + b = 10$