Question

if X + y is equals to 8 and x y is equals to 3 find the value of 3 ( X² + y²)​

Answer 1

x+y =8

x+y =8xy= 3

x+y =8xy= 3(x+y)²= x²+2xy+y²

x+y =8xy= 3(x+y)²= x²+2xy+y² 8² = x²+ y² + 2 (3)

x+y =8xy= 3(x+y)²= x²+2xy+y² 8² = x²+ y² + 2 (3) 64= _____+ 6

x+y =8xy= 3(x+y)²= x²+2xy+y² 8² = x²+ y² + 2 (3) 64= _____+ 6x²+ y² = 58

x+y =8xy= 3(x+y)²= x²+2xy+y² 8² = x²+ y² + 2 (3) 64= _____+ 6x²+ y² = 58So, 3(x²+y²)= 3×58 = 174

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