Question

Factor completely: x2 − 3x + 5

Answer 1

(x+a)(x+b) = x^2 + (a+b)x + ab
thus...

a+b = -3
ab = 5

b = 5/a
a + (5/a) = -3

plug it in your graphing calculator, should give you a, then plug that value into ab = 5 to get b.