exam Maths Puzzle Numerical Ability

Factor each Polynomial: 3a^3 + 3ab^2 + 2(a^2)b + 2b^3

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exam Other Question

Solve the equation. (If there are any unused answer boxes, enter NONE in the last boxes. If any real number is a solution, enter ANY in the answer boxes.)
|4x-5|-9=4
x = _-2__ (smaller value)
x = _4.5__ (larger value) Mr.Nelson lost one of his students test papers. He knos thar thre other 4 students scored as follows: 12,20,21,12. He know that the average score is 19.4.What the score on the missing paper.