Question

please help its urgent​

Answer 1

Answer:

Step-by-step explanation:

1) =-10+15/5+2(removal of brackets and minus *minus = plus)

 =5/5+2

 =1+2

 =3

2)(a3-b3-3ab) - (a3+b3-3ab)

  = (a3-a3)(-b3+b3)(-3ab-3ab)

  = 006a2b2

   =6a2b2

answer: 6a square b square

Answer 2

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refer the attachment