Question

If (x-y)^2=29 what is the value of (x+y)^2?​

Answer 1

Answer:

SOLUTION

If x^2 + y^2 = 29, what is the value of (x - y)^2 ?

Given:

.

Question:

So, basically we should find the value of

(1) xy = 10. Directly gives us the value we needed. Sufficient.

(2) x = 5. Now even if we substitute the value of

in

we'll get two values for

: 2 and -2, hence two values for

: 9 and 49. Not sufficient.

Step-by-step explanation:

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