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3 years ago

Could someone explain why (-4)² is equal to 16 but -4² is equal to -16

Mathematics

2 answers:

erica [24]3 years ago

8 0

Answer:

It's all about the brackets.

Step-by-step explanation:

If we do (-4)^2, the brackets make it -4 x -4 and the two negatives make a positive of 16.

If we do -4^2, that means that the 4 is squared before putting the minus sign there so you have 4x4 = 16 then put the minus to get -16.

Hope this helps!

treviglaslibrary

Afina-wow [57]3 years ago

4 0

Answer:

4^2= 16

Step-by-step explanation:

This is because when you square something your are multiplying that number by itself. So in this case you must multiply 4 x 4 which is sixteen. Another example of this is 3^2 which is 9. In this case you must multiply 3 x 3 which is nine.

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3 years ago

Amanda and jamie are standing 25 feet apart and spot a bird in the sky between them the angle of elevation from Amanda is 25 fee

finlep [7]

Answer:

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Step-by-step explanation:

We can solve this question drawing a triangle using the values given and then using the law of sines. (See image attached to know how to draw the triangle and use the values).

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y + 55 + 63 = 180

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3 years ago

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Answer:

1:D

2:A

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Step-by-step explanation:

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3 years ago

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2 years ago

If x+3/3 = y+2/2 then x/3 =

lukranit [14]

I'd say first isolate the "x"
(x+3)/3=(y+2)/2
x+3=3*(y+2)/2
x=3(y+2)/2 -3

so we get "x" equals three times "y" plus two which is then divided by two and subtracted by three.

after that I would simply divide both sides by three as shown below

x/3=( 3*(y+2)/2 -3)/3

x/3 =(y+2)/2 -1 (answer simplified)

5 0

3 years ago

Could someone explain why (-4)² is equal to 16 but -4² is equal to -16​

Could someone explain why (-4)² is equal to 16 but -4² is equal to -16