Question

Please answer atleast 5 out of these!!

PLEASE PUT ONLY ANSWERS !!
NOT OTHER THAN THAT​

Answer 1

Answer:

Ans.40

Step-by-step explanation:



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 sqrt(2x+9)+x=13 

One solution was found :

                        x = 8

Radical Equation entered :

     √2x+9+x = 13

Step by step solution :

Step  1  :

Isolate the square root on the left hand side :

     Original equation

     √2x+9+x = 13

     Isolate

     √2x+9 = -x+13

Step  2  :

Eliminate the radical on the left hand side :

     Raise both sides to the second power

     (√2x+9)2 = (-x+13)2

     After squaring

     2x+9 = x2-26x+169

Step  3  :

Solve the quadratic equation :

     Rearranged equation

     x2  - 28x  + 160 = 0

     This equation has two rational roots:

       {x1, x2}={20, 8}

 

Step  4  :

Check that the first solution is correct :

     Original equation, root isolated

     √2x+9 = -x+13

     Plug in 20 for  x 

      √2•(20)+9 = -(20)+13

      Simplify

      √49 = -7

      Solution does not check

      7 ≠ -7 

Step  5  :

Check that the second solution is correct :

     Original equation, root isolated

     √2x+9 = -x+13

     Plug in 8 for  x 

      √2•(8)+9 = -(8)+13

      Simplify

      √25 = 5

      Solution checks !!

     Solution is:

      x = 8

One solution was found :

                        x = 8

Answer 2

Step-by-step explanation:

28 answer

hope it will help you