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sweet-ann [11.9K]
3 years ago
14

Need help please answer

Mathematics
2 answers:
forsale [732]3 years ago
5 0

Answer:

-x^2 + 4

Step-by-step explanation:

Multiply; (2 + x)(2 - x)

= 4 - 2x + 2x - x^2

Combine Like Terms; 4 (-2x + 2x) -x^2

= 4 - x^2

Put in Final Form;

= -x^2 + 4

If you need to solve for X;

Subtract 4

-4 = -x^2

Divide both sides by -1;

4 = x^2

Square root both sides;

2 = x

leonid [27]3 years ago
3 0

Answer:

the answer is 4-x^2

Step-by-step explanation:

-2x

and 2x cancel out

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Answer:

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Step-by-step explanation:

For every 9 children, there are 4 adults. Those numbers added together equal 13. Now, if we divide the total number of adults and children by 13, we will get the number of how many groups there are of 9 kids and 4 adults.

39 / 13 = 3

There are 3 groups of 9 kids and 4 adults, which means to find the total number of children, we have to multiply 3 by 9.

3 * 9 = 27

Therefore, there are 27 children total. I know this was probably really confusing, but I hope it helped in some way! Have a lovely day!! :)

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Step-by-step explanation:

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