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2 votes
Someone please help me thank you

Someone please help me thank you-example-1
User Tddtrying
by
8.7k points

2 Answers

6 votes
4 is the answer to the problem
User Phill Healey
by
8.9k points
5 votes

Answer:

4

Explanation:

7x = x² - 8

=> x² - 7x - 8 = 0

use quadratic formula:

a = 1, b = -7, c = -8

x =
\frac{-(1)±\sqrt{(-7)^(2) - 4(1)(-8) } }{2(1)} (pls ignore the "A" I don't know why it's showing up)

=> x =
(-1±√(49 + 32) )/(2)

=> x =
(-1±9 )/(2)

=> x =
(-1 +9)/(2) = 4 or
(-1-9)/(2) = -5 (the answer is only 4 since it's asking for the positive solution)

Someone please help me thank you-example-1
User Maloo
by
8.0k points

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