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3 years ago

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What is the value of b2 - 4ac for the following equation? 2x 2 - 2x - 1 = 0

1 answer:

Orlov [11]3 years ago

6 0

For you to make an equation a quadratic equation, you need everything to be on one side, so you add one to both sides.

<span>2x^2 + 3x + 0=0 </span>

<span>a=2, b=3, c=0 </span>

<span>b^2-4ac (In the next step just plug in your variables) </span>

<span>3^2 - 4(2)(0) </span>

<span>9 - 8(0) </span>

<span>9 - 0 </span>

<span>Your answer=9</span>

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Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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We have to find n, for which M = 0.02.

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