exam Maths Puzzle Numerical Ability

factoring a quadratic with leading coefficient greater than one
z^2+12z+20

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exam Other Question

can you please help me solve this:Ax+By=-28 contains the points (-8,4)(-11,9) The quadratic function y=a(x-h)^2+k,a is less than 0,is translated nine units down. What is the range of the function? I think it is (y such that y is less than or equal to k-9,y belongs to a set of real numbers)