exam Maths Puzzle Numerical Ability

please show me how to do this.
Multiply:
(5√[2] + 3)(√[2] - 2√[3])

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exam Other Question

any help on how to solve this chart

Fill in the chart given this linear equation:
y = -2x � 9
x y
-2 -5
-1 -7
0 -9
1 -11
2 -13 Factor completely.
12x^3 - 3xy^2
This is my answer is it right?
12x(x - 3y)(x - y)