Question

Factorise- 8x³-36x²+22x+21

Please give correct explanation & answer of the above question

(The question isn't wrong) ​

Answer 1

Answer:

(2x-3)(2x-7)(2x+1)

Step-by-step explanation:

8x³-36x²+22x+21

8x³-(40-4)x²+(42-20)x+21

8x³-40x²+4x²+42x-20x+21

8x³-40x²+42x+4x²-20x+21

2x(4x²-20x+21)+1(4x²-20x+21)

(4x²-20x+21)(2x+1)

(4x²-(6+14)x+21)(2x+1)

(4x²-6x-14x+21)(2x+1)

{2x(2x-3)-7(2x-3)}(2x+1)

(2x-3)(2x-7)(2x+1)