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avatar+2864 

I'm not that good at math, as I am only in middle school, so please help.

 

Express the following in simplest form : (2)4x+2(2)6x5(8)x

 

Please don't give me the answer, give me any hints about helpful strategies I can use to solve this.

 

Source: Mathcounts Lectures (18) Simplifying Algebra Expressions

 

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I simplified it to 218x215x(2)4x+2

 

But I'm not sure how the -2 will affect the final simplified form

 

I have vague ideas that (2)4x+2 will always be positive,

 

My answer of 2(18x215x)(4x+2) (haven't simplified binomials) doesn't seem to be quite correct...

 Apr 25, 2019
edited by CalculatorUser  Apr 25, 2019
edited by CalculatorUser  Apr 25, 2019
edited by CalculatorUser  Apr 25, 2019
 #1
avatar+37168 
+1

hint    :      3^x   *    3^4   =  3^(x+4)   not   3^(4x)

 Apr 25, 2019
 #2
avatar+26398 
+3

Express the following in simplest form : (2)4x+2(2)6x5(8)x

 

(2)4x+2(2)6x5(8)x=((1)(2))4x+2(2)6x5(8)x|(ab)c=acbc=(1)4x+2(2)4x+2(2)6x5(8)x|ab+c=abac=(1)4x(1)2(2)4x+2(2)6x5(8)x|(1)2=(1)(1)=1=(1)4x(2)4x+2(2)6x5(8)x|8=23=(1)4x(2)4x+2(2)6x5(23)x|(ab)c=abc(23)x=23x=(1)4x(2)4x+2(2)6x5(23x)|abacad=ab+c+d=(1)4x24x+2+6x5+3x=(1)4x24x+2+6x5+3x=(1)4x213x3

 

laugh

 Apr 25, 2019
edited by heureka  Apr 25, 2019
 #3
avatar+2864 
+3

wow, I totally messed up the exponent rules!!!

 

Thanks, I thought this would be a hard problem.

 Apr 25, 2019

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