Algebra Polynomials Practice Test Results

Question 1
67% answer correctly
If n = 5 what`s the value of \\(3n^2 - 9n + 17\\) ?
13
30
47
120
Question 2
79% answer correctly
(n + 5)(n + 9) = ?
\\(n^2\\) + 14n - 45
\\(n^2\\) + 14n + 45
\\(n^2\\) - 45n + 45
\\(n^2\\) - 14n - 45
Question 3
63% answer correctly
\\((x - 4)(x^2 + 6x + 4)\\) = ?
\\(x^3 + 2x^2 -20x + 16\\)
\\(x^3 + 2x^2 -20x - 16\\)
\\(x^3 + 2x^2 + 20x - 15\\)
\\(x^3 + 4x^2 -20x - 16\\)