Question

use factoring to solve this equation
x^2-8x+15=0

Answer 1

x= 8 +- 2
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2

Answer 2

product = 15, sum = -8..

Answer 3

x^2-8x+15=0
x^2 -5x -3x + 15 = 0
x(x-5) -3(x-5) = 0
(x-3)(x-5) = 0

this can be true only if either x-3=0 or x-5=0

if x-3 = 0 => x=3
if x-5 = 0 => x=5

solutions set is x = 3,5