Question

20. Solve by using Quadratic formula
x2-x-6=0​

Answer 1

Answer:

b^2 - 4ac =(-)1)^2 - 4(-6)(1)

= 1 + 24=

=25

-(-1)+5/2=1+5/2=6/2=3

-(-1) - 5/2=-4/2=-2

so the two roots are 3 and - 2

Answer 2

Answer:

13, -12

Step-by-step explanation:

X = −b ± (√b²−4ac) / 2a

= 1 ± (√1+24)/2

= 1 ± 25 / 2

X = 1 + 25 / 2 = 26/2 = 13

or

X = 1 - 25 / 2 = -24/2 = -12

I hope you understand..