book Maths Puzzle Numerical Ability

Solve by completing the square:

w^2 - 2w- 15 = 0


Solve
x^2 + 2x - 8 < or = to 0

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book Other Question

If I invest $2500 per year for 40 years at 6.8% compounded continuously, what would my final balance be? The length of a rectangle is 2 in. more than twice its width. If the perimeter of the rectangle is 34 in., find the dimensions of the rectangle.