Question

please solve this...??​

Answer 1

Answer:

Hello buddy !

See the picture for solution

Answer 2

Given x + y = 5√2 ; xy = 15

we know that ,

${( a + b)}^{2} = {a }^{2} + {b}^{2} + 2ab$

substituting in that formula ,we get

${(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy$

${(5 \sqrt{2)} }^{2} = {x}^{2} + {y}^{2} + 2(15)$

$25 \times 2 = {x}^{2} + {y}^{2} + 30$

${x}^{2} + {y}^{2} = 50 - 30$

So,

${x}^{2} + {y}^{2} = 20$

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