exam Maths Puzzle Numerical Ability

xy + y + 2x + 2
Factor the following four-term polynomials by grouping.

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exam Other Question

If you have a bad grass fire with wind that is burning at the rate of .04 acres per second how many acres will burn in 48 hours? (assuming the rate will not change the entire time) Perform the indicated operations and simplify the following expression:
x+6/x^2-16 * 3x-12/3x+18
A) 0
B) 3 / 3(x+4)
C) 1/x+4
D) -1/x+4