Question

Please give the solution with rough work:

Answer 1

Answer:

6 x^{2}

Step-by-step explanation:

1. first add up the positive numbers i.e.
   2 x^{2} &7 x^{2}
   =9 x^{2} .
   
   2. 9 x^{2} (+)-3 x^{2}
       =6 x^{2}