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 one year ago
Help me on this question please... I really dont know where to start thanks!!
 one year ago
Help me on this question please... I really dont know where to start thanks!!

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Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0\[\huge3^{x} + 5 \times 3^{x} = 54\]

DeadShot
 one year ago
Best ResponseYou've already chosen the best response.0to start, we need to isolate the variables, we start by dividing both sides by 3^x, then subtract 5 from both sides, and then multiply both sides by 3^x \[3^x + 5 \times 3^x \div 3^x = 54 \div 3^x\] \[3^x + 5  5 = 54/3^x\]

DeadShot
 one year ago
Best ResponseYou've already chosen the best response.0\[3^x \times 3^x = 54/3^x \times 3^x  5\]

DeadShot
 one year ago
Best ResponseYou've already chosen the best response.0\[9^x^2 = 51\] so now we find the square root of each side

DeadShot
 one year ago
Best ResponseYou've already chosen the best response.0\[\sqrt{9^x^2} = \sqrt{51}\]

DeadShot
 one year ago
Best ResponseYou've already chosen the best response.0the square and square root cancel each other out, so it would be \[9^x \approx 7 \]

Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0im not sure but thats not the answer that is in the back of the book :P

DeadShot
 one year ago
Best ResponseYou've already chosen the best response.0divide both sides by 9 \[9^x \div 9 = 7 \div 9\] \[^x = 7/9\]

Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0thats not the answer in the book :P

Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0i think the way he started the question was wrong cause i was told to keep the same base

artix_17
 one year ago
Best ResponseYou've already chosen the best response.1Yea, 3^x X 3^x can be written as 3^2x

Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0yea i agree on that

Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0\[\huge3^{2x} + 5 = 3^{3} \times 2\] this might help?

artix_17
 one year ago
Best ResponseYou've already chosen the best response.1How did you get that?

rizwan_uet
 one year ago
Best ResponseYou've already chosen the best response.2dw:1359366605554:dw

Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0i broke up 54 into 3^3 times 2 cause i wanted to make the base the same which in this case 3

rizwan_uet
 one year ago
Best ResponseYou've already chosen the best response.2dw:1359366719099:dw

Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0i didnt see you could factorise 3^x out of that equation!! Thanks so much to both of you :)

artix_17
 one year ago
Best ResponseYou've already chosen the best response.1You can do the 3^x X 3^x = 3^2x

artix_17
 one year ago
Best ResponseYou've already chosen the best response.1No, because its actually 3^x + ( 5 X 3^x )

artix_17
 one year ago
Best ResponseYou've already chosen the best response.1You have to either solve inside the bracket first or factorize

Kuoministers
 one year ago
Best ResponseYou've already chosen the best response.0oh thanks @artix_17 for pointing that out!! I wouldn't have noticed :P
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