2 years ago

X^2 +1/x^2+12(x+1/x) +38,

1 answer:

5 0

Answer:

Step-by-step explanation:

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svlad2 [7]

Answer:

$\large\boxed{C)\ 7}$

Step-by-step explanation:

Use:

$a^n\cdot a^m=a^{n+m}$

$2^{x+3}-2^x=2^x\cdot2^3-2^x=8\cdot2^x-2^x=(8-1)\cdot2^x=7\cdot2^x\\\\2^{x+3}-2^x=k(2^x)\\\\7\cdot2^x=k(2^x)\Rightarrow k=7$

$8\cdot2^x-2^x=8\cdot2^x-1\cdot2^x=(8-1)(2^x)=7\cdot2^x\\\\\text{distributive property:}\ a(b-c)=ab-ac$

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3 years ago

hodyreva [135]

6 ... I may be wrong tho

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2 years ago

AysviL [449]

A gram, because a milligram is one thousandth of a gram.

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3 years ago

AfilCa [17]

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2 years ago

podryga [215]

1. Combining like terms
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2 years ago

X^2 +1/x^2+12(x+1/x) +38, ​