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Ainat [17]
2 years ago
8

Please help me with this problem. Urgent

Mathematics
1 answer:
OverLord2011 [107]2 years ago
6 0

Answer:

\frac{x-1}{x^{2} +2x-3}

\frac{1}{x+3}

Step-by-step explanation:

first, subtract the two fractions

You will have

\frac{x-1}{x^{2} +2x-3} the un-simplified difference of those expressions

Lets try to simplify that

Lets find the roots of the polynomial from the bottom using the formula for quadratic equation, (-b +/- sqrt( b2-4*a*c)) /(2*a)

Which are x=-3, and x=1

Thus, you have (x+3)*(x-1)

So

\frac{x-1}{x^{2} +2x-3} = \frac{x-1}{(x+3) (x-1)}= \frac{1}{x+3}

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Answer:

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She will receive $12.51 in change.

hope this helped!  

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