Question

Someone please help me thank you

Answer 1

4 is the answer to the problem

Answer 2

Answer:

4

Step-by-step 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 = $\frac{-1±\sqrt{49 + 32} }{2}$

=> x = $\frac{-1±9 }{2}$

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