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### Grade 8 - Mathematics7.37 Problems - I

 Example: If x+y = 7, xy = 12, find the value of x2+y2. Solution: Given that, x+y = 7 Squaring on both side, we get (x+y)2 = 72 x2+2xy+y2 = 49 x2+2.12+y2 = 49 (Since xy = 12) x2+y2+24 = 49 x2+y2 = 49-24 x2+y2 = 25. Directions: Solve the following problems. Also write at least ten examples of your own.
 Q 1: If x+y = 8, xy = 12, find the value of x2+y2.45604065 Q 2: If x+y = 7, xy = 10, find the value of x2+y2.29491939 Q 3: If x+y = 5, xy = 6, find the value of x2+y2.97813 Q 4: If x+y = 10, xy = 16, find the value of x2+y2.78685848 Q 5: If x+y = 10, xy = 21, find the value of x2+y2.52575658 Q 6: If x+y = 12, xy = 20, find the value of x2+y2.124134144154 Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!

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