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Over [174]
3 years ago
12

Pls help and explain

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
7 0

Answer:  x(7 - 2)    <em>none of the answer choices are correct</em>

<u>Step-by-step explanation:</u>

7x + (-2x)

= 7x - 2x       (opposite signs changes to a negative sign)

factor out an x:

= x(7 - 2)

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Which of the following expressions is equal to 2x2 + 18 ?
ehidna [41]
<h3>Answer: Choice C. (2x - 6i)(x + 3i)</h3>

Work Shown:

2x^2 + 18

2(x^2 + 9)

2(x - 3i)(x + 3i) .... see note below

(2x - 6i)(x + 3i)

Note: I used the rule that a^2 + b^2 = (a - bi)(a + bi). I recommend FOILing out the right hand side to confirm the equation is true. You'll use the idea that i^2 = -1.

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3 years ago
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9514 1404 393

Answer:

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Step-by-step explanation:

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4 0
3 years ago
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Reil [10]
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3 years ago
Read 2 more answers
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Explanation calculator
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