exam Maths Puzzle Numerical Ability

x^2-4x-1=0 solve by completing the square.

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exam Other Question

answer for one video club charges $25 to become a member and $2.50 to rent each video another charges no rental fee and $3.25 to rent each video how many videos must you rent to make the first club more economical Simplfy 4a3n6+ 4(a3n)6= 4(an2)3. the numbers behind the variables are the exponents and the ones outside of the parenthesis.