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s2008m [1.1K]
2 years ago
9

Which of the following expressions are equivalent to 4+ (14 – 2) CHOOSE 3

Mathematics
1 answer:
Vanyuwa [196]2 years ago
7 0

Answer:

The last 3, so C, D, and E.

Step-by-step explanation:

4+(14-2) = 16

See which of the following equations in the image create the value of 16 to find which ones are equivalent.

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x^2 - x - 7 = 0

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Now we must take half of the x coefficient (-1), which would be -.5. Then we square it and add it to both sides. This is the second step to any completing the square problem.

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Now that we have done that, the left side will be a perfect square so that, we can factor it.

x^2 - x + .25 = 7.25

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Now we can take the value of that square root and solve.

x - .5 = +/-\sqrt{7.25}

x - .5 = +/-2.69

x = .5 +/- 2.69

And with the + and - both there, we need to do both to get the two answers.

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