Question

solve the quadratic equation ?? x2 – 6x – 16 = 0

Answer 1

use the quadratic formula \[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\]
do you know how to use it?

Answer 2

yournot suppose to use that!!

Answer 3

\[x ^{2}-8x+2x-16 = 0\]
\[x(x-8)+2(x-8) =0\]
(x+2)(x-8)=0

Answer 4

x^2-6x-16=0
(x-3)^2 = 25
x-3=+-sqrt(25)
x-3 = +-5
x = -5+3 or x = 5+3
x = -2 or x =8
now you see all three methods for solving this:)

Answer 5

yes thanks