Question

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Answer 1

Respuesta:

3/2

Explicación paso a paso:

(a + b) = 20

$a^{2} - b^{2} = 60$

Por producto notable:

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

20 (a - b) = 60

(a - b) = 60/20

(a - b) = 3

Calcular (a - b)/2

(a - b) / 2 = 3/2