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Solve the equation.
2
x2 − 4x − 21
 = 
3
x2 + 5x + 6
x =     Incorrect: Your answer is incorrect.
 

 
 
 
15.0/1 points |  Previous AnswersGHColAlg11 1.3.036.
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Complete the square to make a perfect-square trinomial.
x2 + 8x
 Incorrect: Your answer is incorrect.
 

 
 
 
16.–/1 pointsGHColAlg11 1.3.038.
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Complete the square to make a perfect-square trinomial.
x2 − 12x
 
 
[removed][removed]

 
 
 
17.0/1 points |  Previous AnswersGHColAlg11 1.3.042.
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Complete the square to make a perfect-square trinomial.
s2 − 3s
 Incorrect: Your answer is incorrect.
 

 
 
 
18.–/1 pointsGHColAlg11 1.3.044.
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Complete the square to make a perfect-square trinomial.
p2 + 
3
2
p
 
 
[removed][removed]

 
 
 
19.1/1 points |  Previous AnswersGHColAlg11 1.5.058.
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Simplify the expression.
i10
 Correct: Your answer is correct.
 
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20.1/1 points |  Previous AnswersGHColAlg11 1.5.060.
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Simplify the expression.
i91
 Correct: Your answer is correct.
 
[removed][removed]

 
 
 
21.1/1 points |  Previous AnswersGHColAlg11 1.5.062.
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Simplify the expression.
i48
 Correct: Your answer is correct.
 
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22.1/1 points |  Previous AnswersGHColAlg11 1.5.066.
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Simplify the expression.
i0
 Correct: Your answer is correct.
 
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23.–/1 pointsGHColAlg11 1.5.074.
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Write without absolute value symbols. (Simplify your answer completely.)
|5 + 12i|
 
 
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24.0/1 points |  Previous AnswersGHColAlg11 1.5.076.
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Write without absolute value symbols. (Simplify your answer completely.)
4 − i
 Incorrect: Your answer is incorrect.
 
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25.–/1 pointsGHColAlg11 1.6.006.
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Use factoring to solve the equation for real values of the variable. (Enter your answers as a comma-separated list.)
x3 + 4x2 − 12x = 0
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