Question

how to factorise x^2-3x-4?

Answer 1

\[x^2-3x-4=0\]

Find two numbers that multiply to be -4 and add to be -3, and those are the solutions you need to answer.

Answer 2

oduct sum rule
Product=-4
Sum=1
=x^2+x-4x-4=0
=x(x+1)-4(x+1)=0
=(x-4)(x+1) (x-4)
=0 & (x+1)=0
ans x=4 or x=-1

Answer 3

@AfricanBrucelee cannot be,cuz this question comes from a partial fraction question and whe i used the values you gave me the answer didn't work out

Answer 4

(x+1)(x-4)=0->x=-1,x=4

Answer 5

@Syderitic That seems legit. thanks man!

Answer 6

good then i'll attempt using another method.......