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Llana [10]
4 years ago
14

Question 1: Identify the zeros of the function f(x) = 4x2 − 8x − 1 using the Quadratic Formula. Answers: -1/2 + sqaureroot 5, 1/

2 + sqaureroot 5, 1 + sqaureroot 5, -1 + sqaureroot 5 Question 2: Identify the zeros of the function f(x) = 2x2 − 4x + 5 using the Quadratic Formula. Answers: 1 + i sqaureroot 6 / 2, 2 + i sqaureroot 6 / 2, 1 + i sqaureroot 6 / 2, -1 + i sqaureroot 6 / 2
Mathematics
1 answer:
Lelechka [254]4 years ago
3 0

Answer:

1.  1/2 +/-√5

2.  1 +/-  i √6/2.

Step-by-step explanation:

1.  f(x) = 4x^2 - 8x - 1

x = [-(-8) +/-√((-8)^2 - 4*4*-1)] / (2*4)

x =[ 8 +/- √80] / 8

= 1 +/- 4√5/8

= 1 +/- √5/2

= 1/2 +/-√5

2. By a similar method the zeros of the the second equation are:

x = [-(-4) +/- √((-4)^2 - 4*2*5)]  / 4

= 4 +/- √(16 - 40) / 4

= 1 +/- √(-24)/4

= 1 +/- i  √6 * 2 / 4

= 1 +/-  i √6/2.

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77. Find the greatest common factor (GCF) of the polynomial: 12x^4 + 8x^3 - 16x^2
Fed [463]

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4x^2

Step-by-step explanation:

The greatest common factor of 12, 8, and 16 can be no larger than the smallest difference between these numbers, which is 4. 4 is a factor of each number, so is the GCF of them.

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a newly-planned tree needs to be staked with three wires. each wire is attached to the trunk 3ft. above the ground, and then anc
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       | \
3ft   |   \
       |_ _\
        4ft
a²+b²=c²           Pythagorean Theorem
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3 years ago
Which table shows ordered pairs that satisfy the function y=4x-2
s2008m [1.1K]
<h3>Answer: Choice D</h3>

==========================================================

Explanation:

If you plug in x = -2, then,

y = 4x-2

y = 4(-2)-2

y = -8-2

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This shows that the answer must be choice D, as this is the only answer that has x = -2 lead to y = -10. Note the first column of table D.

We could stop here if you wanted.

----------------------

If we kept going and plugged in x = 0, then,

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We have x = 0 lead to y = -2. This matches with the second column of table D.

-----------------------

Lastly, if we plugged in x = 2, then we get,

y = 4x-2

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So the third column of table D is also confirmed.

3 0
3 years ago
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