# How do you solve #x^2-3x = 28#?

##### 3 Answers

#### Explanation:

Some times you can spot the factors other times not so easy. If you are ever really stuck and the method of solution is not fixed use the formula or complete the square.

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Given:

Subtract 28 from both sides

Notice that

So

#### Explanation:

Write in the standard quadratic form

Factorise

For this to be true either

Hence the answer

#### Explanation:

Factorise:

or

Hence: