Question

What number should be added to the expression x2 + 6x to change it into a perfect square trinomial?
A.3
B.6
c.9
D.12

Answer 1

you would take the coeficient attached to the x
divide it by 2 and square it

For Example: for x^2 + 8x
you would take 8
8 / 2 = 4
4^2 = 16
so perfect square would be x^2 + 8x + 16

Answer 2

so whats the answer?

Answer 3

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so I can't tell you the answer, sorry :/

but if you use the method that I showed, you should be able to get the answer :)
please try it? :3

Answer 4

To complete your perfect square try dividing your 6 that you have by 2 then squaring it so 6/2 then ^2 and then add that to your equation so 2x+6x+(6/3)^2 would be your answer