Question

Which of the binomials below is a factor of this trinomial?

x2 - 9x + 18

A. x - 6
B. x + 3
C. x + 6
D. x - 9

Answer 1

turn into form of (x-a)^2+k

Answer 2

\[x^2 - 9x + 18=(x-\frac{ 9 }{ 2 })^2-(\frac{ 9 }{ 2 })^2+18 =\\\]

Answer 3

so whats the answer? A?B?C?D? Thanks

Answer 4

because i dont really get this topic

Answer 5

another way is
(x-...)(x-...)=x^2-9x+18
(x-3)(x-6)

Answer 6

-3-6=-9
-3*(-6)=18

Answer 7

How about this one.
Which of the binomials below is a factor of this trinomial?

x2 - x - 12

A. x - 6
B. x - 3
C. x + 6
D. x + 3