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Snezhnost [94]
2 years ago
12

What is the value of c such that: x2 + 14x + c, is a perfect-square trinomial? A. 7 B. 98 C. 196 D. 49

Mathematics
2 answers:
SVEN [57.7K]2 years ago
8 0
Your answer is d.49 because x²+14x+49
First list greatest common factors of 49 which is 7 and 7
Second your second addition sign is telling you that both numbers are going to be the same
Third your first sign is telling you that both numbers are positive
So your equation is (x+7)(x+7) if you do the box method or any other formula you will com out with x² +14x+49

If you need additional help from this topic I will gladly send you my notes your welcome
BlackZzzverrR [31]2 years ago
6 0
I think b is your answere.
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Answer:

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Step-by-step explanation:

we have

\sqrt{11-2x}=\sqrt{x^{2}+4x+4}

we know that

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<u><em>Verify each solution</em></u>

Substitute each value of x in the expression above and interpret the results

1) For x=-7

\sqrt{11-2(-7)}=\sqrt{-7^{2}+4(-7)+4}

\sqrt{25}=\sqrt{25}

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therefore

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2) For x=1

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therefore

x=1 is not a an extraneous solution

therefore

Neither solution is extraneous

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