Cuanto es x al cuadrado menos 10x igual a 199?

X ^ 2 - 10x = 199

x ^ 2 - 10x - 199 = 0

Solve for x over the real numbers :

x ^ 2 - 10 x - 199 = 0

Add 199 to both sides :

x ^ 2 - 10 x = 199

Add 25 to both sides :

x ^ 2 - 10 x + 25 = 224

Write the left hand side as a square :

(x - 5) ^ 2 = 224

Take the square root of both sides :

x - 5 = 4 sqrt(14) or x - 5 = - 4 sqrt(14)

Add 5 to both sides :

x = 5 + 4 sqrt(14) or x - 5 = - 4 sqrt(14)

Add 5 to both sides :

Answer : | | x = 5 + 4 sqrt(14) or x = 5 - 4 sqrt(14).