exam Maths Puzzle Numerical Ability

I am trying to graph the following quadratic equation xsquared - 4 = 0
i am instructed to find the related function
axis of symmetry

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exam Other Question

Multiply

(x +2)(x+1)(x-2) If 5 ounces is equal to 140 grams, then 2 pounds of ground meat is equal to how many ounces?

PLEASE HELP this problem is giving me head ache, where do i start? please.