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LuckyWell [14K]

3 years ago

13

Select the correct answer for when you evaluate the following function at f(5):

2 answers:

quester [9]3 years ago

5 0

A because (-5)^2 = 25 + 2(5) =35-1=34

klio [65]3 years ago

3 0

A. 34
f(5)=5^2+2x-1
you replace all x with 5
5^2=25
2(5)= 10
f(5)=25+10-1
f(5)=34

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The answer to your question is x ≠ -10 x ≠ 2 x ≠ -2

Solution $\frac{(x- 8)(x + 2)}{(x + 8)(x - 2)}$

Step-by-step explanation:

Process

1.- Factor all the polynomials

$\frac{x^{2} -3x - 40}{x^{2} + 8x - 20} / \frac{x^{2}+ 13x + 40}{x^{2}+ 12x + 20}$ = $\frac{(x-8)(x + 5)}{(x + 10)(x- 2)} / \frac{(x+ 8)(x + 5)}{(x + 10)(x + 2)}$

2.- Invert the second term

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3.- Simplify

= $\frac{(x- 8)(x + 2)}{(x + 8)(x - 2)}$

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x ≠ -10 x ≠ 2 x ≠ -2

This values are from the factor expressions and then equal to zero.

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