Use the Law of Cosines to write an expression equivalent to z.

  see below

Step-by-step explanation:

The pattern you're trying to match is ...

The first term (a) must match x^2.

The last term (bc) must match 2xy·cos(Z). Since one of the tiles is cos(z), assigning that to "c" will leave "b" = 2xy, another tile. Hence the solution shown below. (Note that values of "b" and "c" could be swapped and the equation would still be correct, even if the form doesn't quite match.)

correct answer:

b.(19,-2)

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

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