+0  
 
+5
713
4
avatar+1311 

Consider the equation
\[ \frac{4x^3+2x^2+6x+7}{2x+1}=2x^2+3+\frac4{2x+1}. \]

a) Show that this equation is true when $x=10.$

b) Explain why this equation is true for all $x$ other than $x=-\dfrac12.$

------->Begin each part by explaining what your strategy for solving will be.<--------

AWESOMEEE  Jun 30, 2015

Best Answer 

 #4
avatar+87294 
+10

AWESOMEEE....just do what  rosala   said for part a

 

For part b,  if x = (-1/2) , the denominator of 2x + 1  would equal 2(-1/2) + 1   = -1 + 1  = 0  .......and we can't divide by 0  !!!!!

 

 


CPhill  Jun 30, 2015
 #1
avatar+11847 
+5

Awesomee, in the first part you can just place 10 in place of all x's

solve the equation with separating the two parts as RHS and LHS....then place 10 in place of x,where there is power for example ^2 then you will multply 10 two times.....and so after you solve and get the answer to both RHS and LHS then you will know if the equation is true or not.....

 

 

are you getting me?

 

 

sorry i dont know the 2nd one!

rosala  Jun 30, 2015
 #2
avatar+1311 
+5

na na, nananananana, *blocks ears with hand*

AWESOMEEE  Jun 30, 2015
 #3
avatar+11847 
+3

No fun when we are learning be serious!

rosala  Jun 30, 2015
 #4
avatar+87294 
+10
Best Answer

AWESOMEEE....just do what  rosala   said for part a

 

For part b,  if x = (-1/2) , the denominator of 2x + 1  would equal 2(-1/2) + 1   = -1 + 1  = 0  .......and we can't divide by 0  !!!!!

 

 


CPhill  Jun 30, 2015

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