Factor by grouping.15x2 - 12x + 10x - 8
A. (5x - 4)(3x - 2)
B. (5x + 4)(3x + 2)
C. (5x + 4)(3x - 2)
D. (5x - 4)(3x + 2)
Answer: D
Mathematics
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Find the gradient ?f.f(x, y) = -3xy2 + 6x2y
A. x(-3y + 12x)i + y(6x - 6y)j B. y(6y - 6x)i + x(-3x + 12y)j C. x(6x - 6y)i + y(-3y + 12x)j D. y(-3y + 12x)i + x(6x - 6y)j
Mathematics
Use a finite approximation to estimate the area under the graph of the given function on the stated interval as instructed.f(x) = 
between x = 2 and x = 9 using the "midpoint rule" with two rectangles of equal width.
A. 
B. 
C. 
D. 
Mathematics
Factor the trinomial.54 + 15x + x2
A. (x + 9)(x + 6) B. (x - 9)(x - 6) C. (x - 9)(x + 6) D. (x + 54)(x + 1)
Mathematics
Find the sum of the sequence.
A. 230 B. 55,260 C. -230 D. 30
Mathematics