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If (x+y) =(y+y+y) and (x+y)= 5, then what is the value of (x2+y2)?

If (x+y) =(y+y+y) and (x+y)= 5, then what is the value of (x2+y2)? Correct Answer 13

Let Ist no = x 2nd no = y 3rd no = z According to Q. (x + y)/2 = 15 + (y + z)/2 Multiply above equation by 2 x + y = 30 + y + z So, x - z = 30 Difference of Ist & 3rd no is 30.

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