Help!!

Equations: solve by completing the square

x^{2}-10x=56

ManuelBautista2019
Feb 28, 2018

#1**+2 **

x^2 -10x =56 take 1/2 the 'b' coefficient (-10) square it and add it to both sides of the equation

x^2 -10x + 25 = 56 +25 now you can do this:

(x-5)^2 = 81

Now x-5 = +- 9

x = 14 or -4

ElectricPavlov
Feb 28, 2018

#2

#3**+1 **

Both answers are correct...... substitute them into the original equation to see !

ElectricPavlov
Feb 28, 2018