1.

If x minus y is equal to 7 and x y is equal to 9 find the value of x square + y square​

Answer»

ANSWER:

x-y=7

squaring both SIDE

(x-y)²=7²

x²+y² - 2XY =49

x²+y² - 2 x 9 =49

x²+y² - 18= 49

x²+y² = 49 + 18

x²+y² = 67



Discussion

No Comment Found

Related InterviewSolutions