exam Maths Puzzle Numerical Ability

How to sketch a figure that shows a line that intersects two nonintersecting planes.

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exam Other Question

I need some help with this problem please.

Find a value for k so that 9m^2 - kn^2 will have the factors 3m + 7n and 3m - 7n.

I am not sure how to solve this can you help? Thank you. (2x-3)^2=25