Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = -7x4 + 2x3 - 9x2 + 2x - 5
A. 0 or 2 positive; 0 or 2 negative
B. 0, 2, or 4 positive; 0 negative
C. 0 or 2 positive; 0, 2, or 4 negative
D. 0, 2, or 4 positive; 0, 2, or 4 negative
Answer: B
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Solve the problem.Which statement is true about row 8 in Pascal's Triangle?
A. The entries in row 8 correspond to the coefficients of (x + y)8 . B. The entries in row 8 correspond to the coefficients of (x - y)8 . C. The entries in row 8 correspond to the coefficients of (x + y)7 . D. The entries in row 8 correspond to the coefficients of (x + y)9 .
Perform the indicated operation. Write the answer in scientific notation.
A. 3.3 × 10-14 B. 6.6 × 10-14 C. 6.6 × 104 D. 3.3 × 104
Determine whether the equation is quadratic.x2 - 2x + 4 = 0
A. No B. Yes
Find the product.(9x + 5)2
A. 9x2 + 90x + 25 B. 9x2 + 25 C. 81x2 + 90x + 25 D. 81x2 + 25