It will be easier to understand this using a venn diagram :
Is there a graph or anything given
1. it is right-angled triangle because it has a 90 degree angle.
You solve the equation : t^2 - 9t - 90 = 0 ;
Δ = ( - 9 )^2 - 4 * 1 * ( - 90 ) = 81 + 360 = 441 ;
t1 = ( 9 +

) / 2 = 30 / 2 = 15 ;
t2 = ( 9 -

) / 2 = -12 / 2 = - 6 ;
The numbers are 15 and - 6 ;
Answer:
12/35
Step-by-step explanation:
(2/5)*(6/7)=12/35
since 12/35 is in simplest form, and is a regular fraction, it is the answer