exam Maths Puzzle Numerical Ability

The problem is 5s^3+30s^2+40s and I have to factor the expression completely. I got 5s(s^2+6s+8) and my question is how do I factor it out completely?

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exam Other Question

Write the equation of the specified circle in standard form:
Center (3,-2): solution point (-1,1).
Find the GCF of the product.

(6y² - 3y)( y + 7)