exam
Maths Puzzle
Numerical Ability
Evaluate the discriminant b^2-4ac. Then use the answer to state how many real-number solutions exist for the equation.
〖y=x〗^2+8x+16
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exam Other Question
Perform the indicated operations:
(x2 – 11x + 4) – (-2x2 + 2x – 6) – (x2 + 6x – 5)
For the general cubic polynomial f(x)= ax^3 + bx^2 + cx + d (a different from 0).
Find conditions on a, b, c, and d to ensure that f is always increasing or always decreasing on (-00, +00).