Question

Factorise 1.x³+4x²-9x-36
2.x³+8
3.8x³+27y³+125z³-90xyz
4.2x³-8x
Expand
1.(2x-3y)³
2. (2x-1/3y)³​

Answer 1

hope it helps you..

1. 3+42−9−36

2. Common factor

23+8

{\color{#c92786}{2x^{3}+8}}

2x3+82(3+4)

{\color{#c92786}{2(x^{3}+4)}}

2(x3+4)

Solution

2(3+4)

3. sorry to say but I didn't get the correct answer

4.