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Elena-2011 [213]
3 years ago
11

Will give brainliest to correct answer.

Mathematics
2 answers:
o-na [289]3 years ago
7 0
Use Pythagorean's Theorem to solve for c.  c^2=(2 \sqrt{x^2+3x})^2+(3)^2.  We will simplify the right side by squaring both terms.  c^2=4(x^2+3x)+9  which simplifies even further to  c^2=4x^2+12x+9.  In that polynomial, the leading coefficient, 4, is a perfect square, and so is the constant at the end, 9.  So that polynomial is the sum of perfect squares.  It will break down like this:  c^2=(2x+3)^2  so then taking the square root of both sides gives us that c = 2x + 3, choice on the top right.
Anna71 [15]3 years ago
7 0
The correct answer would be C=2x+3
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kobusy [5.1K]

Answer:

7 5/12

Step-by-step explanation:

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We can add the first two terms

5 1/4 + 3/4

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6

6 + 1 5/12

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The answer would be a positive 15.1 or +15.1 because the positive number is greater than the negative which would make your answer positive, thats why you got it wrong :) 
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