x + 2 = 0
x -2
x2^22 = px - 10 = 0
(-2)2^22 - 2p - 10 = 0
4 - 2p - 10 = 0
−2p−2= 6−2\;\frac{-2p}{-2} = \;\frac{6}{-2}−2−2p=−26 →\to→ p = -3
