Solve the quadratic equation by completing the square.x2 + x + 9 = 0
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Factor the expression completely.15x2 + 14x - 8
A. (3x - 4)(5x + 2) B. (3x + 4)(5x - 2) C. (15x + 4)(x - 2) D. (15x + 1)(x - 8)
Mathematics
Write the binomial expansion of the expression.(a - b)6
A. a6 - 6a5b + 15a4b2 - 20a3b3 + 15a2b4 - 6ab5 + b6 B. a6 + 6a5b + 15a4b2 + 20a3b3 + 15a2b4 + 6ab5 + b6 C. - a6 + 6a5b - 15a4b2 + 20a3b3 - 15a2b4 + 6ab5 - b6 D. a6 - 6a5b - 15a4b2 - 20a3b3 - 15a2b4 - 6ab5 - b6
Mathematics
Find n for the given value of an in the arithmetic sequence.an = -366; 810, 789, 768, . . .
A. n = 53 B. n = 54 C. n = 57 D. n = 56
Mathematics
Find the second-order partial derivative.Find fxx when f(x,y) = 8x3y - 7y2 + 2x.
A. -28 B. -14 C. 24x2 D. 48xy
Mathematics