What is AB? I don't get this problem. Help please!

Question

asked Dec 25, 2018 168k views

1 Answer

Vtik · Answer 1 · 2018-12-29T05:19:45+0000

AB = x

6^2 = x * (x+5)

36 = x^2 +5x

x^2 +5x - 36 = 0

(x-4) (x+9) = 0

x = 4, x = -9

it can't be a negative so x = 4

AB = 4 cm