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3 years ago

8

Expand and simplify. (x+4)squared

2 answers:

mylen [45]3 years ago

8 0

(x+4)²= (x+4)×(x+4)

Use the FOIL method to simplify

F=First (multiply the first number of each expression)
O=Outside (multiply the outside edges of each expression)
I= Inside (multiply the inside edges of each expression)
L= Last (multiply the last number of each expression)

x times x= x²
x times 4= 4x
4 times x= 4x
4 times 4= 16

Add them together, we have: x²+4x+4x+16
We can simplify this by adding like terms
4x+4x=8x

Final expression= x² + 8x + 16

Setler79 [48]3 years ago

6 0

$(x+4)^2 = x^2 + 2(x)(4) + 4^2 .....................(By-identity) \\ \\ => x^2 + 8x + 16$

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stich3 [128]

<u>Answer:</u>

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<u>Step-by-step explanation:</u>

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Our length here is y + 2. Either formula you use, [(y+2) + (y+2) or 2(y+2)] you should get the answer 2y + 4.

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pav-90 [236]

Given:

The height of the cylinder = 12 in

The diameter of the base of the cylinder = 8 in.

To find:

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Solution:

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$r=\dfrac{8}{2}$

$r=4$

So, the radius of the base of the cylinder is 4 in.

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Where, B is the base area and r is the radius.

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So, the volume is $192\pi$ cubic inches.

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