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

User Daniel Mitchell
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1 Answer

2 votes
(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
User Prespic
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