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Maths Puzzle
Numerical Ability
Find (a) the discriminant, (b) the number of solutions and (c) the nature of the solutions for 5x^2-7X-4=0
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book Other Question
the 12th term of an arithmatic series is 42 and the sum of the first 17 terms is 51. find the common difference of the series and the first three terms.
solve each system
4x+8y+z=2
x+7y-3z=-14
2x-3y+2z=23