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lorasvet [3.4K]
3 years ago
12

Which of the following expressions is equal to 2x2 + 18 ?

Mathematics
1 answer:
ehidna [41]3 years ago
4 0
<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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$6.30 per DVD

Step-by-step explanation:

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The architects side view drawing of a saltbox-style house shows a post that supports the roof ridge. The support post is 10 ft t
pochemuha
These calculations are based on the drawing of the file enclosed.

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From the big right triangle:

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From the small right triangle on the right side

x^2 +10^2 = b^2

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3 years ago
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One third of a number t is equal to 7
Vikentia [17]
If one third of t is 7 than t is equal to 21
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BD bisects ∠ABC, m∠ABD=(7x−1)°, and m∠DBC=(4x+8)°. Find m∠ABD.
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Answer:

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Step-by-step explanation:

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