Question

Use the quadratic formula to find the roots of the equation. x2 + 3x - 18 = 0
A. {-6, 3}
B. {-2, 9}
C. {-3, 6}
D. {-9, 2}

Answer 1

( x +6) ( x -3)
x= -6,3

Answer 2

a-1,b=3 ,c= -18
b^2-4ac= 3^2- 4 ( 1) (-18)= 81 sq 81=9
-3+ 9/ 2=3
-3-9/2= -6