What number would you add to both sides of x2 – 20x = 5 to complete the square?

answer:

we have to add 100 to both sides to complete the square.

step-by-step explanation:

the given equation is

on comparing with

a = 1

b = -20

c=5

now, in order to solve it by completing square method, we add both sides by

so we have to add 100 to both sides of the equation

let us check by adding 100 to both sides

we can rewrite the left hand side of the equation as

thus, the left hand side of the equation is a perfect square.

hence, we have to add 100 to both sides to complete the square.

you can not drow on this

step-by-step explanation: