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Sindrei [870]
3 years ago
10

Solve x2 + 12x + 25 = 17 by completing the square. Select all the possible solutions.

Mathematics
1 answer:
lawyer [7]3 years ago
4 0
Answer: A, c, d

Step by step:
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Simplify the expression:<br> ( X + 5)( X-7)
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(x + 5)(x - 7)
x(x - 7) + 5(x - 7)
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x² - 7x + 5x - 35
x² - 2x - 35
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f(x)=x+3

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Which branch of maths includes the most of other branches symbols/functions ect.​
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2 years ago
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Xelga [282]

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A

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Find the exact value of sin (arccos (3/5)). For full credit, explain your reasoning.
zloy xaker [14]
The equation for cosine is <span><span><span>cos<span>(x)</span></span>=<span>Adjacent/Hypotenuse
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</span></span></span>
Find <span><span>Adjacent=3</span></span> and <span><span>Hypotenuse=5.
</span></span>Then, using the Pythagorean theorem, find <span><span>Opposite=?
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a² = 5² - 3² = 25 - 9 = 16
a = √16 = 4

<span><span>Adjacent=3</span></span><span><span>Opposite=4</span></span><span><span>Hypotenuse=5
</span></span><span>
Plug in the value for sin(x) = opposite/hypotenuse

sin(x) = 4/5 </span>
6 0
3 years ago
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