Multiply 5x^4-2x^4+3x-4 by 2-3x-7x^2
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Answer:
-21x^6-9x^5+6x^4-21x^3-37x^2-6x-8
Step-by-step explanation:
{(5x^4 - 2x^4) + 3x - 4} * (2-3x-7x^2)
={3x^4 + 3x - 4} * (2-3x-7x^2)
=6x^4+6x -8 - 9x^5 -9x^2-12x-21x^6-21x^3-28x^2
= -21x^6-9x^5+6x^4-21x^3-37x^2-6x-8
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