Question

Factorise
a) x + 3x - 4

Answer 1

the answer to this equation is 4(x-1)

Answer 2

(x-1)(x+4)

Explanation:

I’m guessing you meant x^2+3x-4.

The easiest part is knowing that:

(x-_)(x+_)

You have to look for numbers that multiply to -4 and add up to 3. Therefore, it would be -1 and 4:

(x-1)(x+4)