Question

7. Find the value of x + y when x2 + y2 = 25 and xy = 12.
8. If (x + k)2 = x2 + 6x +q, find the values of k and q.

Answer 1

Answer:

I have also problem in this question .

It is of class 10

Answer 2

Answer:

7

Step-by-step explanation:

GIVEN- X^2+Y^2=25 AND XY=17

USING IDENTITY=(X+Y)^2=X^2+Y^2+2XY

substituting value in identity

(x+y)^2=25+2×12

(x+y)^2=25+24

(x+y)^2=49

x+y=7

hope this helps

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