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Exponent Algebra; Help!!

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Joined: 09 Jun 2017
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Exponent Algebra; Help!! [#permalink]

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New post 17 Oct 2017, 18:27
Can someone please explain to me the following:


[15^x + 15^x(15^1)] => (15^x)(1 + 15)


This is in the solution section of a question from an MGMAT practice CAT and I can't for the life of me figure out how they arrived at the second part algebraically.

Thanks in advance!!

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Joined: 17 Aug 2017
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Location: India
Concentration: Technology, Finance
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Re: Exponent Algebra; Help!! [#permalink]

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New post 17 Oct 2017, 19:41
mcdo wrote:
Can someone please explain to me the following:


[15^x + 15^x(15^1)] => (15^x)(1 + 15)


This is in the solution section of a question from an MGMAT practice CAT and I can't for the life of me figure out how they arrived at the second part algebraically.

Thanks in advance!!


Take 15^x common and you will get the 2nd part.

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Re: Exponent Algebra; Help!! [#permalink]

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New post 17 Oct 2017, 20:21
mcdo wrote:
Can someone please explain to me the following:


[15^x + 15^x(15^1)] => (15^x)(1 + 15)


This is in the solution section of a question from an MGMAT practice CAT and I can't for the life of me figure out how they arrived at the second part algebraically.

Thanks in advance!!


Please post complete question. Thank you.
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Re: Exponent Algebra; Help!! [#permalink]

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New post 17 Oct 2017, 22:41
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mcdo wrote:
Can someone please explain to me the following:


[15^x + 15^x(15^1)] => (15^x)(1 + 15)


This is in the solution section of a question from an MGMAT practice CAT and I can't for the life of me figure out how they arrived at the second part algebraically.

Thanks in advance!!


They took out 15^x outside the brackets:
\((15^x+15^x * 15) = 15^x (1 + 15) = 15^ x * 16\)
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Re: Exponent Algebra; Help!! [#permalink]

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New post 18 Oct 2017, 18:30
Masshole wrote:
mcdo wrote:
Can someone please explain to me the following:


[15^x + 15^x(15^1)] => (15^x)(1 + 15)


This is in the solution section of a question from an MGMAT practice CAT and I can't for the life of me figure out how they arrived at the second part algebraically.

Thanks in advance!!


They took out 15^x outside the brackets:
\((15^x+15^x * 15) = 15^x (1 + 15) = 15^ x * 16\)



Ohhhhhhhh - thank you!

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Re: Exponent Algebra; Help!!   [#permalink] 18 Oct 2017, 18:30
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