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Serhud [2]
3 years ago
13

If xy=5 and x square +y square =25 ,then (x+y)square ​

Mathematics
2 answers:
nika2105 [10]3 years ago
8 0

Answer:

(x + y)² = 35

Step-by-step explanation:

The expansion of

(x + y)² = x² + 2xy + y²

           = x² + y² + 2xy ← substitute given values

          = 25 + 2(5)

           = 25 + 10

           = 35

Salsk061 [2.6K]3 years ago
4 0

Answer:

35

Step-by-step explanation:

xy = 5 \\  \\  {x}^{2}  +  {y}^{2}  = 25 \\  \\  \because  \:  {(x + y)}^{2}  =  {x}^{2}  +  {y}^{2}  + 2xy\\  \\    \therefore {(x + y)}^{2}  =  25 + 2 \times 5 \\  \\ \therefore {(x + y)}^{2}  =  25 + 10 \\  \\  \huge \red{ \boxed{\therefore {(x + y)}^{2}  =  35}}

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