Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.cos (x - ?) = cos x
A. 
B. 
C. - 
D. 0
Answer: D
Mathematics
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Provide an appropriate response. Find the product: (x - 8)(x + 8)
A. x2 - 64 B. x2 - 16 C. x2 - 16x + 64 D. x2 + 64
Mathematics
Use the quadratic formula to solve the equation.x2 + 6x + 9 = 0
A. {3} B. {-3} C. {-3, 3} D. {3 - i, 3 + i}
Mathematics
Decide whether the graph opens up or opens down.f(x) = -(x + 3)2 + 8
A. opens down B. opens up
Mathematics
Divide. Assume all variables are nonzero.
A. 3m3 - 12m6n5 + 10m5n7 B. 3m3 - 6m2n4 + 5mn6 C. 18 D. 3m11 - 6m10n6 + 5m9n8
Mathematics