Question

Solve using the quadratic formula: 2x^2+10x+15=0

Answer 1

-1.382 & -3.618

Explanation:

-b+-sqrtb^2-4ac/2a

a=2

b=10

c=15

-10+-sqrt10^2-4(2)(15) = -10+-sqrt20

= -10 +- 4.472

= -10 + 4.472 =-5.528/4 =-1.382

-10 - 4.472 =-14.472/4 = -3.618