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Find each square (x+4)^2

Sagot :

Wallameg000

Answer:

[tex]x^{2} +8x+16[/tex]

Step-by-step explanation:

There are 2 ways to find the square of a binomial. You can use FOIL or use a formula. Just remember that the square of a binomial will always be a trinomial.

FOIL

Since we are squaring a binomial we can rewrite the expression as (x+4) * (x+4). FOIL stands for First, Outside, Inside, Last. This explains how to multiply out 2 binomials. This method will give you 4 different terms that can then be combined to find the answer.

First - multiply the first terms of each binomial

  • x * x = [tex]x^{2}[/tex]

Outside - multiply the terms on the outside of both binomials

  • x * 4 = 4x

Inside - multiply the terms on the inside of both binomials

  • 4 * x = 4x

Last - multiply the last terms of each binomial

  • 4 * 4 = 16

Now we can combine these terms to create the new polynomial [tex]x^{2} +4x+4x+16[/tex]. Then, combine like terms for the final answer: [tex]x^{2} +8x+16[/tex].

Shortcut

Another way to square binomials is to use the formula [tex]a^{2} +2ab+b^{2}[/tex], where a is the first term and b is the second term. So, for this formula, the binomial would look like (a+b).

So, we can apply this formula by plugging in x for a and 4 for b.

  • [tex]x^2+2*4*x+4^2[/tex]

Then, multiply the middle term

  • [tex]x^{2} +8x+4^2[/tex]

Finally, square 4

  • [tex]x^2+8x+16[/tex]

This gives us the same final answer as the method above.

koredeyusuf799

Step-by-step explanation:

(x+4)^2

you can also expand it

(x+4)(x+4)

x^2+4x+4x+16

x^2+8x+16

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