Respuesta :

rosas31287
(x + 1) x (x - 4). When you check it you will get your original expression.
Officialalehpeter

Answer:

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

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