Copy and simplify the following expressions by combining like terms. Using or drawing sketches of algebra tiles may be helpful.

2x^2+30+3x^2+4x^2+14+x

20+5xy+4y^2+10+y^2+xy

Respuesta :

Answer:

9x^2 + x + 44 and   6xy + 5y^2 + 30

Step-by-step explanation:

Step by step solution :

Step  1  :

Equation at the end of step  1  :

 (((((2•(x2))+30)+(3•(x2)))+22x2)+14)+x

Step  2  :

Equation at the end of step  2  :

 (((((2•(x2))+30)+3x2)+22x2)+14)+x

Step  3  :

Equation at the end of step  3  :

 ((((2x2 +  30) +  3x2) +  22x2) +  14) +  x

Step  4  :

Trying to factor by splitting the middle term

4.1     Factoring  9x2+x+44  

The first term is,  9x2  its coefficient is  9 .

The middle term is,  +x  its coefficient is  1 .

The last term, "the constant", is  +44  

Step-1 : Multiply the coefficient of the first term by the constant   9 • 44 = 396  

Step-2 : Find two factors of  396  whose sum equals the coefficient of the middle term, which is   1 .

     

-396

  +    

-1

  =    

-397

     

-198

  +    

-2

  =    

-200

     

-132

  +    

-3

  =    

-135

     

-99

  +    

-4

  =    

-103

     

-66

  +    

-6

  =    

-72

     

-44   +   -9  =  -53

For tidiness, printing of 30 lines which failed to find two such factors, was suppressed

Observation : No two such factors can be found !!  

Conclusion : Trinomial can not be factored  

Final result :

 9x2 + x + 44

Step by step solution :

Step  1  :

Equation at the end of step  1  :

 ((((5xy + 20) +  22y2) +  10) +  y2) +  xy

Step  2  :

Trying to factor a multi variable polynomial :

2.1    Factoring    6xy + 5y2 + 30  

Try to factor this multi-variable trinomial using trial and error  

Factorization fails

Final result :

 6xy + 5y2 + 30

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