book Maths Puzzle Numerical Ability

please find the illegal values of b in the fraction 2b2 + 3b - 10 / b2 - 2b - 8

A. b= -5 and 2
B b= -2 and -4
C. b= -2 amd 4
D. b= -5, -2 , 2 and 4

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book Other Question

3-2x=20

9y+6y-8=4y+2y-y-11
I'm sorry this is so long but i tried really hard and cannot answer this question!

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