Rewrite the equation by completing the square.

x^2-8x - 51 = 0

x = 5.1

Step-by-step explanation:

okay start with simplifying x^2 in the equation, x * x = 2x

2x + 8x - 51 = 0

simplify by adding the 2x with the 8x, giving us 10x - 51 = 0

now lets add 51 to both sides, 10x = 51

divide both sides by 10, x = 5.1