Question

third no question ka answer plz

Answer 1

answer of 1st question is

Answer 2

         (turn words into a mathematical expression) 
3. (i) $(3+4z+3y-x+3x+2y-3z+2)-(3x+4y-2z)$

(group the like terms)
=       $[(3x-x)+(3y+2y)+(4z-3z)+(3+2)]-(3x+4y-2z)$

(simplify)
=       $(2x+5y+z+5)-(3x+4y-2z)$

(remove the brackets)
=       $2x+5y+z+5-3x-4y+2z$

(group the like terms and start simplifying)
=        $(2x-3x)-(5y-4y)+(2z+z)+5$

(final answer)
=        $-x-y+3z+5$

(re-arranged)
=        $3z-y-x+5$


     (turn words into a mathematical expression)
(ii)  $(5x^2-2x+3x^2-x+3)+(3x^2+2x-11-2x^2+3x-5)$

      (group the like terms)
=    $[(5x^2+3x^2)-(2x+x)+3]-[(3x^2-2x^2)+(2x+3x)-(5+1)]$
       
      (simplify)
=    $(8x^2-3x+3)-(x^2+5x-6)$
     
      (remove the brackets) 
=    $8x^2-3x+3-x^2-5x+6$
       
      (arrange the variables and start simplifying)
=    $(8x^2-x^2)-(3x+5x)+(3+6)$

      (final answer produced)
=    $7x^2-8x+8$

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