Question

Factorise 4x(2x+3)(2x-1)(x+1)-54. The answer is 2(2x²+2x+3)(4x²+4x-9), but I don't know how. Plz help fast. Thanks!!

Answer 1

4x(2x+3)(2x-1)(x+1)-54. 

(8x² + 12)(2x-1)(x+1)-54

(64x³+24x-8x²+12) (x+1) -54

64x^4+24x²-8x³+12x+64x³+24x-8x²+12

{bring all like terms together}

64x^4+24x²-8x²-8x³+64x³+12x+24x+12-54

=64^4 + 16x² + 56x³ + 36x - 42  is the answer.............

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hope it helps u

Answer 2

Answer:

above answer is wrong...from the very 1st step