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3 years ago

Does anyone know the answers to this algebra question? Will give brainiest

Mathematics

1 answer:

MaRussiya [10]3 years ago

3 0

Option 1 : -22

using formula

(a + b )(a - b ) = a^2 - b^2

(√10 + 2√8) (√10 - 2√8)

= (√10)^2 - (2√8)^2

= 10 - 2×2×8=10-32

= -22

2nd question answer is option 3

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See the graph of the function $f(x)=x^3+x^2-9x-9$ in the attached image.

<h3>Constructing a graph</h3>

For constructing a graph we have the following steps:

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For this exercise, for example, we can define a range -4<x<4. In others words, the values of x will be in this interval.

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When x=-4, we will have: $\left(-4\right)^3+\left(-4\right)^2-9\left(-4\right)-9=-21$ . Do this for the all x-values of your ranges.

See the results for this step in the attached table.

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The attached image shows the graph for the given function.

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Learn more about intercepts of the graph here:

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