Question

If x+ y= 12 and xy = 14, find the value of x^2+ y^2

Answer 1

Step-by-step explanation:

$x {}^{2} + {y}^{2} = (x + y) {}^{2} - 2xy \\ = 12 {}^{2} - 2 \times 14 \\ = 144 - 28 = 116$