Question

factorise the following 1. x^3+4x+4​

Answer 1

Step-by-step explanation:

x^3+4x+4

coefficient of x=1

x(1×constant=1×4=4

2×2=4 such that it satisfies middle term by + or -(2+2=4)

x^3+2x +2x+4

x(x^2+2)+2(x+2)

=(x+2)(x+2)(x^2+2)