(2x² + 3x - 5)(-x² + 7x + 2)

Mathematics

1 answer:

Alexxandr [17]3 years ago

6 0

Answer:

-2x^4 + 11x^3 + 30x^2 - 29x - 10

Step-by-step explanation:

1. Use the Distributive Property

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

2. Remove parenthesis

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

3. Collect like terms

-2x^4 + 14x^3 + 4x^2 - 3x^3 + 21x^2 + 6x + 5x^2 - 35x - 10

4. -2x^4 + 11x^3 + 30x^2 - 29x - 10

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Brums [2.3K]

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Answered by Guathmath

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2 years ago

The length of a rectangular wall is 16.5 feet. The height of the wall is 8.625 feet. Cameron determines the area of the wall to

iris [78.8K]

Answer:

<h2>Cameron solution is not reasonable, because it must have 4 decimals points, not three.</h2>

Step-by-step explanation:

When calculating the area of the rectangular wall, we have to multiply 16.5ft(8.625ft), if we observe, we have 4 decimals in total. The multiplications results 142.3125. So, Cameron solution is not reasonable, because he only included three decimals points, instead of four.

$16.5ft(8.625ft)=142.3125ft^{2}$