Multiply.
\[
(2 x-4)\left(5 x^{2}+7 x-1\right)
\]
Simplify your answer.
Answer
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Answer
\(\boxed{=10x^3 - 6x^2 - 30x + 4}\)
Steps
Step 1 ：\(=(2x - 4) \times (5x^2) + (2x - 4) \times (7x) + (2x - 4) \times (-1)\)
Step 2 ：\(=10x^3 - 20x^2 + 14x^2 - 28x - 2x + 4\)
Step 3 ：\(\boxed{=10x^3 - 6x^2 - 30x + 4}\)
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