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Gennadij [26K]
3 years ago
8

Expand and simplify. (x+4)squared

Mathematics
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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The solution to the given system of linear equations lies in which quadrant?
nexus9112 [7]

Answer:

The solution to the given systems of linear equation is {3, -1} lies in IV Quadrant.

Step-by-step explanation:

Given:

x-3y = 6  ........( 1 )

x+y=2    ........( 2 )

To find :

x = ?

y = ?

Solution:

Let solve the  above equation to get the solutions.

Eliminate X by subtracting the two equations equation 1 minus equation 2

(x-3y) - (x+y) = 6 - 2\\-4y = 4\\\therefore y=-1

Now substitute for y = -1 in equation 2 we get

x+(-1)=2\\\therefore x = 2+1\\\therefore x = 3

Therefore, solution set is {3, -1}

In

I Quadrant {x,y} = {+,+}......both the coordinates are positive.

II Quadrant {x,y} = {-,+}.....X coordinate is negative and Y coordinate is positive.

III Quadrant {x,y} = {-,-}......both the coordinates are negative.

IV Quadrant {x,y} = {+,-}.....X coordinate is positive and Y coordinate is negative. {3,-1}

Point A on the graph is the solution.

8 0
3 years ago
What is z in 3z - 18 = - 6
Nata [24]

Answer:

4

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
What is 5(3x+8) answer?
sergeinik [125]

Answer:

15x + 40

Step-by-step explanation:

5(3x + 8)

Use the distributive property and multiply 5 by 3x and 8

5(3x + 8)

15x + 40

7 0
3 years ago
NEED HELP PLEASE BEGGING PLEASE!!!!
Sliva [168]

Answer:

-54

Step-by-step explanation:

8(-9) - 6(-3)\\

Multiply 8 by -9 and 6 by -3

-72 - (-18)

SubtractValue = -54

Hope this helps

plz mark brainliest

6 0
3 years ago
Help??I have 4 questions and im confused on all of them
KengaRu [80]
So you you are trying to find the area of sphere so you would use this formula
A=4•3.14•r^2

And you already know that the radius is 6 so you would go ahead and plug in the numbers
A=4•3.14•4^2

4^2 is 16 so your final equation would be
A=4•3.14•16

And your answer is

=452.39
4 0
3 years ago
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