Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(x - y)2
A. x2 - xy + y2
B. x2 - y2
C. x2 - 2x2y2 + y2
D. x2 - 2xy + y2
Answer: D
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Solve the given differential equation. (The form of yp is given.)D2y + 49y = sin x - 1 (Let yp = A + B sin x + C cos x.)
A. y = c1 sin 7x + c2 cos 7x + 
+ 
sin x
B. y = c1 sin 7x + c2 cos 7x - 
+ 
sin x
C. y = c1 sin 7x + c2 cos 7x - 
- 
sin x
D. y = c1 sin 7x + c2 cos 7x - 
+ 
sin x + 
cos x
Divide. Round the quotient as indicated.10.2 ÷ 1.2; tenths place
A. 8.5 B. 85.0 C. 0.9 D. 9.5
Decide whether or not the equations are equivalent.x = 4 - 3x2x = 4
A. Not equivalent B. Equivalent
Form a polynomial whose zeros and degree are given. Use a leading coefficient of 1. Zeros: -3, -2, 2; degree 3
A. f(x) = x3 - 3x2 + 4x - 12 B. f(x) = x3 + 3x2 + 4x + 12 C. f(x) = x3 + 3x2 - 4x - 12 D. f(x) = x3 - 3x2 - 4x + 12