Antonia is factoring the polynomial, which has four terms.
21x3-63x2+15x-45
3[7x3-21x2+5x-15]
3[7x2 (x-3) + 5 (x-3) ]
Which is the completely factored form of her polynomial?
21x2 (x - 3)
36x2 (x - 3)
3 (7x2 + 5) (x - 3)
3 (12x2 + 5) (x - 3)
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