Question

9. If x + y = 13 and xy = 36, find the value of
x² + y².​

Answer 1

Answer:

97

Step-by-step explanation:

(x+y)²=x²+y²+2xy

(13)²=x²+y²+2(36)        (Substituting values)

169=x²+y²+72

169-72 =x²+y²

97=x²+y²