exam Maths Puzzle Numerical Ability

I need help with some math problems Please

factor the following polynomials

24x^3y -8xy^2

16x^2-24xy+9y^2

5r^3-5

(36x^2-49y^2) Thanks alot for your help!!!!!

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exam Other Question

Given rstu is a parallelagram, su is the median to rt
Prove: angle str is congruent to angle utr in an evening, a sporting goods store sold twice as monay T-shirts as shorts. t-shirts are $9 each, and shorts are $14 each. The total amount of money taken in for both items was $256. Find the number of each that was sold ( using and method ).