Question

factorise 1+8x3
please do it fast​

Answer 1

To factorise:-

1+8x³

Solution:-

We know, that

a³+b³ = (a+b)(a²+b²-ab)

Therefore,

1+8x³

→ (1)³+(2x)³

→ (1+2x)[(1)²+(2x)²-1×2x)]

→ (1+2x)(1+4x²-2x)

Hence, Factorized.