exam Maths Puzzle Numerical Ability

t^2-24-10t
(t+?)(t-?)
I have tried -10,1..-1,10..2,-5......5,-2...... I believe this is prime.
would you jsut check behind me please?
Thank you Dianne

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exam Other Question

Jesse wants to know how tall the tree he is standing next to is. Jesse is 6 ft. tall and casts a shadow that is 9 ft. The tree is casting a shadow that is 28 ft. How tall is the tree? Round to the nearest tenth, if necessary. 4/7 (3-2x)- 8/3x + 2