If a polynomial function f(x) has roots –9 and 7 – i, what must be a factor of f(x)?

see explanation

Step-by-step explanation:

If a polynomial has roots x = a, x = b, x = c then

(x - a), (x - b) and (x - c) are the factors of the polynomial.

Note that complex roots occur in conjugate pairs, thus

x = - i is a root then so is x = i

given f(x) has roots

x = - 9, x = 7 and x = - i, x = i, then

(x + 9), (x - 7), (x + i), (x - i) are the factors of f(x)

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?

a.for lorena 14 hours makes $126   for 16 hours she makes 144

for julie 6 hours makes $72 for 21 hours its $252

b. julie makes more money than lorena julie makes $12 an hour and lorena makes $9  

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