Choose the correct answer.

1. Which of following is rule of indices?
a) x^a ÷ x^b = x^a+b
b  x^a  ÷ x^b = x^a-b
c  x⁶ ÷  x^b= x^ab
d) All of these

2. If the sum of roots are 12 and product of roots is 30, then the equation will be_____
a) x²-10x+30=3
b) x²-10x-30=0
c) x²-30x+10=1
d) None of these