exam Maths Puzzle Numerical Ability

write 5c^3w/2bd^3+3z^2/10c^3d as a single expression

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exam Other Question

Hi. I have taken a certification test this past weekend and want to know if I got the answer to the problem below correct or not. Thanks!

(3+1)
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(6+4)^2 factor:

4x^3-8x^2-x+2