exam Maths Puzzle Numerical Ability

Graph x = 3
of course there is a graph but not sure how it is supposed to go help.

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exam Other Question

Find four consecutive even intergers whose sum is 340. I am having trouble obtain the correct answer for solving the following information:

F(x)= 2x^2 - 7x - 4

use the vertex and intercepts to sketch the graph of each quadratic f