book Maths Puzzle Numerical Ability

what is the factors of 2x*x-27x+36=0

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book Other Question

the width of a rectangle is 3 inches less than its length. the area of the rectangle is 340 square inches. what are the length and width of the rectangle?
thank you!!!! Hi I need help with this problem: The directions say to find the solution by the addition method.
-x+y=2
x+y=4
If you could show how it is done I would appreciate it. Thank you..