Tabitha2002 Tabitha2002

14-01-2019
Mathematics

contestada

given xy =4 and x^2 + y^2=a, which exspression is equal to (x+y)^2? A: a+6 B: a+4 C: a+8 D: a

Respuesta :

grujan50 grujan50

14-01-2019

Answer:

Corretct answer is C: a+8

Step-by-step explanation:

Given xy=4 and x∧2+y∧2=a

The square of the binomial is

(x+y)∧2 = x∧2 + 2xy + y∧2

when we rearrange this equation we get:

(x+y)∧2 = (x∧2 + y∧2) + 2 (xy) = a + 2 · 4 = a + 8

God with you!!!

Answer Link

Kate4922 Kate4922

19-05-2021

Answer:

a+8

Step-by-step explanation:

Did the math and got it right

Answer Link

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