Question

) If one root of the equation x2 - mx + 9 = 0 is - 3 then value of m is​

Answer 1

Step-by-step explanation:

x*2 -mx +9 =-3

here a =1

b=-m and

c=9

quadratic formula =x=-b+/- √b*2-4ac÷2a

=m +/-√(-m)*2 -4(1)(9) ÷2(1)

=m+/-√m*2-36÷2

-3=

Answer 2

Answer:

m=-6

Step-by-step explanation:

if -3 is root of this equation so it must satisfy this e equation

put x=-3 in equation

(-3)^2-m(-3)+9=0

9+3m+9=0

3m=-18

m=-18/3

m=-6

hope you understand this solution