Algebra Polynomials Practice Test Results

Question 1
79% answer correctly
(n + 5)(n + 9) = ?
\\(n^2\\) - 45n + 45
\\(n^2\\) + 14n + 45
\\(n^2\\) - 14n - 45
\\(n^2\\) + 14n - 45
Question 2
81% answer correctly
(d + f)(r + s) = ?
2dr \\(\\times\\) 2ds \\(\\times\\) 2fr \\(\\times\\) 2fs
2(dr + ds + fr + fs)
2(dr \\(\\times\\) ds \\(\\times\\) fr \\(\\times\\) fs)
dr + ds + fr + fs
Question 3
67% answer correctly
If n = 5 what`s the value of \\(3n^2 - 9n + 17\\) ?
47
30
13
120