book Maths Puzzle Numerical Ability

If f(x)=2x^2-5x-3, then f(-3)=

A)0
B)30
C)18
D)48

Please show me step by step how this works

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book Other Question

put the equation in the standard form of a quadratic equation ax2+bx+c=0
1. 4/x2+3/x-10=0

2. 6+4/x-1=5/x-3

3. 3.5x+4.6/x =1.2

i could not figure how to write a fraction The sum of three consecutive integers is 969. What are the integers?