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Margaret [11]
3 years ago
5

One of the solutions to the equation x² - 5x-24 = 0 is 8. What is the other solution?​

Mathematics
2 answers:
ehidna [41]3 years ago
7 0
X^2 - 5x - 24
(X - 8)(x + 3)
X = 8 and x = -3
Therefore, the other solution is -3.
creativ13 [48]3 years ago
6 0

Answer:

-3

Step-by-step explanation:

This is a quadratic equation. Therefore, one way we can solve this is by using the quadratic formula, \frac{-b+\sqrt{b^2-4ac} }{2a} and \frac{-b-\sqrt{b^2-4ac} }{2a}.

a, b, and c represent the coefficients in our equation x^2-5x-24=0. a represents the coefficient of the term with degree of 2, which is 1. b represents the coefficient of the term with degree of 1, which is -5. c represents the coefficient of the term with degree of 0, which is -24.

Let us plug them in the equation! Let us start with this one: \frac{-b+\sqrt{b^2-4ac} }{2a}

\frac{5+\sqrt{(-5)^2-4*1*(-24)} }{2} =\\\frac{5+\sqrt{25+96} }{2} =\\\frac{5+\sqrt{121} }{2} =\\\frac{5+11}{2} =\\\frac{16}{2} =\\8

Oops! We are looking for the other solution. Let us plug in the values in this equation instead: \frac{-b-\sqrt{b^2-4ac} }{2a}

\frac{5-\sqrt{(-5)^2-4*1*(-24)} }{2} =\\\frac{5-\sqrt{25+96} }{2} =\\\frac{5-\sqrt{121} }{2} =\\\frac{5-11}{2} =\\\frac{-6}{2} =\\-3

<em>I hope this helps! Let me know if you have any questions :)</em>

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