exam
Maths Puzzle
Numerical Ability
Solve using the quadratic formula:
25x2+30x+9=0
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exam Other Question
How many four-element subsets containing two vowels and two consonants can be formed from the set {a, b, c, d, e, f, g, h, i}?
Factor and use the principal of zero.
2x^2+20=x^2+9x (the letter x is squared both times in the problem)