simplify: -4x^2(5x^2+3x-7)-3x?

2008-06-04 9:36 am

and (3x^2)(7x^-5)(x^3)

回答 (4)

2008-06-04 9:41 am

✔ 最佳答案

-4x^2(5x^2 + 3x - 7) - 3x
= -20x^4 - 12x^3 + 28x^2 - 3x
= -x(20x^3 + 12x^2 - 28x + 3)

(3x^2)(7x^-5)(x^3)
= 21x^(2 - 5 + 3)
= 21x^0
= 21

*βω*

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2008-06-04 12:15 pm

1)
-4x^2(5x^2 + 3x - 7) - 3x
= -20x^4 - 12x^3 + 28x^2 - 3x
= x(-20x^3 - 12x^2 + 28x - 3)

2)
(3x^2)(7x^-5)(x^3)
= (21x^-3)(x^3)
= 21

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2008-06-04 10:52 am

Question 1
- 20x^4 - 12x³ + 28x² - 3

Question 2
21(x^0) = 21

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2008-06-04 9:43 am

please re- write your question.

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