Use factoring to solve the equation.x2 - x = 20
A. -4, 5
B. -4, -5
C. 4, 5
D. 1, 20
Answer: A
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Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = 8i + 6j , v = i - j
A. 14; -14k B. 2; -2k C. 14; -k D. 2; 2k
Determine the discriminant and then use that value to determine the most efficient way of solving the quadratic equation. DO NOT SOLVE THE EQUATION.0 = 3w2 + 4w - 3
A. 52; factoring B. -20; quadratic formula C. 52; quadratic formula D. 52; no real solution
Use synthetic division to determine whether x - c is a factor of the given polynomial.x3 - 12x2 + 36x - 32; x - 2
A. Yes B. No
Solve the problem. Round your answer to the nearest tenth, when appropriate. Use the formula 
, as needed.Find [H3O+] if the pH = 3.4.
A. 4.0 × 10-4 B. 2.5 × 10-3 C. 4.0 × 10-3 D. 2.5 × 10-4