Question

Need help on this question not one single person got it right.

Answer 1

3x² = 6x + 8 (isosceles triangle)

3x² - 6x - 8 = 0

(put it into the quadratic formula)

x = 2.91485

x = - 0.914854 (x cannot be a negative value as length is being discussed)

x = 2.91 (2 dp)