book Maths Puzzle Numerical Ability

h(x) = 19; find h (4), h(-6), and h(12).

P(x) = 3x^2 - 2x + 5; find P(0),P(-2), and P(3).

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book Other Question

How would you translate phrases into algerbraic expressions?
Example: twice a number How do i "factor Each polynomial"? I have 3 Questions.
#1- 45x^4-5y^4 - forty-five X to the fourth power minus five Y to the fourth Power

#2- 48a^5y-147ay^7 - Forty-eight A to