exam Maths Puzzle Numerical Ability

Factor these ?

4x^2 -12x -40

2x^2 -16x +30

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exam Other Question

find the equation of each line described below
a)
the line through the points (-1,2) and (3,-4)
a(x)+b(y)=c i think
b)
the line perpendicular to the line 2y=x-4 and containing Please help me solve this word problem
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