I'll teach you how to solve 20x^3+4x^2-45x-9
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20x^3+4x^2-45x-9
Add parentheses:
(20x^3+4x^2) + (-45x-9)
Factor out -9 and 4x^2:
-9(5x+1)+4x^2(5x+1)
Factor out the common term 5x+1:
(5x+1)(4x^2-9)
Factor 4x^2- 9:
(5x+1)(2x+3)(2x-3)
Your Answer Is (5x+1)(2x+3)(2x-3)
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