book Maths Puzzle Numerical Ability

directions: find all the roots of each equation.

2x^3+3x^2-6x-9=0

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book Other Question

Please solve following quadratic equations using method completing the square:
x^2 + x = -1 I am trying to get into level 2 algebra at my comm. college. Its been almost 8 years since i've been in school, so im a little rusty!!! Here are a few examples if you could please