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3 years ago

Which statement justifies that x2 + 3x − 1 multiplied by 2x2 − 2x + 1 obeys the closure property of multiplication?

2 answers:

7 0

(x² + 3x - 1)(2x² - 2x + 1)

x²(2x² - 2x + 1) + 3x(2x² -2x + 1) -1(2x² - 2x + 1)
2x^4 - 2x³ + x² + 6x³ - 6x² + 3x - 2x² + 2x - 1
2x^4 - 2x³ + 6x³ + x² - 6x² - 2x² + 3x + 2x - 1
2x^4 + 4x³ - 7x² + 5x - 1

(D)The result 2x4 + 4x3 − 7x2 + 5x − 1 is a polynomial.

Mandarinka [93]3 years ago

6 0

Answer:(D)The result 2x4 + 4x3 − 7x2 + 5x − 1 is a polynomial.

Step-by-step explanation:

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Answer:

Step-by-step explanation:

So, we have-

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So, we will solve inside of the parenthesis first.

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We got that settled last-

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Lastly, we add them all.

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So, there is your answer!

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2 years ago

Which facts could be applied to simplify this expression? Check all that apply.

kykrilka [37]

The answer is B, C, and D. Like terms are terms with all the same variable, so 5x and -x are like terms.

C is correct. If we add -x to 5x, we get 4x. The other numbers remain unchanged because they have no like terms.

D is correct. Applying the rule of like terms, which is that like terms are numbers with the same variable, only add together numbers with the same variable.

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3 years ago

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