exam Maths Puzzle Numerical Ability

Given f(x) = 5x^ - 3x + 1, how would I find f(-2)?

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exam Other Question

What is the graph of the equation 6x2 - 24x - 5y2 - 10y - 11 = 0 (2,3);(-2,3);(-2,-3);(2,-3).If you join these points ,What will the shape be?My answer is square.