exam Maths Puzzle Numerical Ability

simplify the expression -2k^2m4(-5km^3)

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Please help me.

Solve by completing the square.
2x^2+10x+11=0

I get-5+-sqrt23/2

not sure how I got there. Is it right? How should I work it out. An independent television station airs a movie-of-the-week every Wednesday. Their market research shows that their horror movies are viewed by an average of 2600 people, their come