Factored form of x^2-3x-4

(x + 1) x (x - 4). When you check it you will get your original expression.

x=4, x=-1

Step-by-step explanation:

x2-3x-4

To factorise we will need to get two numbers that when added it will give - 3 and the same two numbers when multiplied it will give you-4

The two numbers involved is - 4 and + 1

x2-4x+x-4

Let's factorise

x (x-4) + 1 (x-4)

(x-4) (x+1)

x-4=0

Make x the subject of formula

x=4

x+1=0

Let's make x the subject of formula

x=-1