Find values of x and y such that both fx(x,y) = 0 and fy(x,y) = 0.f(x,y) = 12xy - 6x2 + 8x
A. x = 0, y = - 
B. x = 0, y = 
C. x = 
, y = 0
D. x = - 
, y = 0
Answer: A
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Solve for the indicated variable.Solve for x.2x2 - 4xy + 3y2 = 1
A. x = -y ± 
B. x = -y ± 2
C. x = 
D. x = y ± (1 - y)
Multiply the polynomials. Express the answer as a single polynomial in standard form.(5x + 4)3
A. 25x6 + 20x3 + 4096 B. 125x3 + 300x2 + 300x + 64 C. 25x2 + 40x + 16 D. 125x3 + 300x2 + 240x + 64
Verify the identity.(tan ? + 1)2 + (tan ? - 1)2 = 2 sec2 ?
What will be an ideal response?
Decide if the given value of x is a critical number for f, and if so, decide whether the point is a relative minimum, relative maximum, or neither.f(x) = (x + 5)4; x = -5
A. Critical number but not an extreme point B. Critical number; relative maximum at (-5, 0) C. Not a critical number D. Critical number; relative minimum at (-5, 0)