book Maths Puzzle Numerical Ability

Let f(x)=2x^2 + 3x - 5. What is the value of f(-3)

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Simplify: Thank you for your help.

[3/(x-1)]+3 / [3/(x+1)]-3

Thank you place the following equations in the standard form of a quadratic equation, ax^2+bx+c=0

a)4/x^2+3/x-10=0

b)6+4/x-1=5/x-3

c)3.5x+4.6/x=1.2

use the quadratic formula to s