# How do you solve #x^2=21x# graphically and algebraically?

##### 1 Answer

Apr 10, 2016

#### Answer:

or

(see below for methods)

#### Explanation:

**Method 1: (Not recommended)

Graphically you could plot points for each of the equations

and

on the same plane.

With a large enough sheet of paper you would find that the lines for the two equations intersect at

given the solutions for

**Method 2: Algebraically

which is true if