book
Maths Puzzle
Numerical Ability
complete the square, and find the roots of the quadratic equation.
x^2 + 16x = 0
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book Other Question
My question says to simplify the radicals.
(square root of 6- square root of 5)( square root of 6+ square root of 5)
Could you help me? thanks!
(a) If we roll two fair dice, what is the probability that a total of nine shows?
(b) if we toss four fair coins, what is the probability that we get exactly two heads?