BlossomFlower
Answered

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What value should be added to the expression to create a perfect square?
[tex]x^2 + 16x[/tex]
A. 64
B. 4
C. 16
D. 8

Sagot :

RedRicin
Let's take a look at a perfect square trinomial.

[tex](x+7)^2[/tex]

We can distribute this expression to get [tex]x^2+14x+49[/tex].

An important relation to recognize here is that the constant is the square of half of the x value.

Now, if we wanted to add a number to [tex]x^2+16x[/tex] to make a perfect square trinomial, we could have the value of x and then square it.

Half of 16 is 8, and 8 squared is [tex]\boxed{64}[/tex]

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