book Maths Puzzle Numerical Ability

7y2 (4y4 + y3 + 7)

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book Other Question

What is the solution to

((cuberoot 2) raised to the 2 -x) = 2 raised to the x^2
Factor each trinomial:

6). 18x^2-27x-5

8). 18y^2+ 9y -5