Math

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this question does not make sense to me.

Add the proper constant to the binomial so that the resulting trinomial is a perfect square trinomial. then factor the trinomail.

X^2+21x+__

What is the constant term?

What is the factored for of the trinomial?

i just cant figure the constant

• Math -

Take half of 21, and square it.

(21/2)^2
(x+21/2)^2

• Math -

What you end up with will be
x^2 + 21x + 110.25 = (x + 10.5)^2

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