book Maths Puzzle Numerical Ability

How do I multiply and write the result in simplest form of 2 over 9 . 4 over 5?

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book Other Question

factor out the GCF from the polynomial -14y^3+8y One side of a rectangle is 7 cm longer than the other side. The diagonal is 8 cm longer than the shortest side of the rectangle. Find the dimensions of the rectangle. I am stuck and do not know how to solve this problem