If (x+y)²=49 and (x-y)²=29
What is the value of x

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22-12-2017
SAT

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If (x+y)²=49 and (x-y)²=29
What is the value of x

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ElenaClaudia ElenaClaudia · Answer 1 · 2017-12-23T20:23:21+01:00

(x+y)² = 49 (x-y)²=29

x + y = √49    x-y=√29 ⇒ y = x - √29

x + y = 7

x+y = 7
But y = x - √29 ⇒ x + x - √29 = 7

   2x - √29 = 7

   2x = 7 + √29

7 + √29
x = ------------
2

If (x+y)²=49 and (x-y)²=29 What is the value of x

Respuesta :

Otras preguntas

If (x+y)²=49 and (x-y)²=29
What is the value of x