Question

What is x3+3x2-x-3 factor by grouping

Answer 1

`x^3+3x^2-x-3`


`x^2(x+3)-x-3`


`x^2(x+3)-(x+3)`


`\boxed{\boxed{(x+3)(x^2-1)}}`

Answer 2

x3 + 3x2-x-3=0
x2(x+3)-(x+3)=0
(x2-1)(x+3)=0
x2-1=0
(x-1)(x+1)=0
x=1
x=-1

x+3=0
x=-3