Question

what value of c makes the polynomial a perfect square x2+9x+c?

Answer 1

11?

Answer 2

to be honest i really dont know, i dont even know where to start but i'm going to use your answero see if it's right

Answer 3

*to

Answer 4

is it x squared?

Answer 5

you divide 9 by 2 and square it. The technique is called Completing the Square.

Answer 6

we want x^2 + 9x +c in the form of (a+b)^2

Answer 7

\[c = \big(\frac{9}{2}\big)^2\]

Answer 8

a^2 + 2ab + b^2 = (a+b)^2
similarly,
x^2 +2.(9/2)x +(9/2)^2 = (x+9/2)^2
so, c=(9/2)^2

Answer 9

thanxx :)