Question

If 2x²-2y²=125 and x-y=2.5 fond the value of x+y

Answer 1

Answer:

25

Step-by-step explanation:

Given equations are 2x^2 - 2y^2 = 125  ------> (1)  (x^2 represents x square)

and x - y = 2.5 ------> (2)

Considering (1), 2x^2 - 2y^2 = 125

=> 2(x^2 - y^2) = 125

=> x^2 - y^2 = 62.5

=> (x + y) (x - y) = 62.5   [x^2 - y^2 = (x+y) (x-y)]

Using (2),

=> (x + y) (2.5) = 62.5

=> x + y = 25

So answer is 25

Answer 2

Answer:

Step-by-step explanation:

See the following attachment for the answer.

Hope it helps

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