exam Maths Puzzle Numerical Ability

Could I please get some assistance with this?

Find the roots of the expression - factor the quadratic expression completely:
6x^2 - 42x + 72

Thank you!

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exam Other Question

Graph 3x+2y=6
2y=-3x+6
y=-3x/2+6/2
y=3x/2+3
How would this be graphed? Would it be graphed with the line running through (2,0) and (3,0)? Let ABC be a triangle. Let D be a point in the interior of <BAC. Let E be such that A-E-B.
1.Are B and E on the same side of AD? Why?
2.Are B and C on the same side of AD