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Mamont248 [21]
3 years ago
12

(x-2)(x+2) Find The Product?

Mathematics
2 answers:
yKpoI14uk [10]3 years ago
5 0
(x-2)*(x+2) = x*(x+2) - 2*(x+2)

<span>(x-2)*(x+2) = x*x + x*2 - 2*x - 2*2
</span>
<span>(x-2)*(x+2) = x^2 + 2x - 2x - 4
</span>
<span>(x-2)*(x+2) = x^2 - 4
</span>
That's the long way to do it. You can use the difference of squares formula as a shortcut

(a-b)*(a+b) = a^2 - b^2

(x-2)(x+2) = x^2 - 2^2

<span>(x-2)(x+2) = x^2 - 4
</span>
either way, the final answer is x^2 - 4
jekas [21]3 years ago
4 0
(X-2)(x+2)
So use "f.o.i.l" meaning you multiply each first term, the outside terms, the inside terms and last terms, and then add. You'd get x^2-4 in this example
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I have one more question I can figure out how to get the answer via the calculator but I'm not sure how I got there
valentinak56 [21]

Answer:

43.6 * 2.94 = 436/10 * 294/100 = (436 * 294)/1000 = 128184/1000 = 128.184

4 0
3 years ago
Please answer this and thank you<br><br> If DE=4x+10, EF=2-1, and DF=9x-15, find DF.
professor190 [17]
I hope that 2-1 means 21.

DE + EF = DF
4x + 10 + 21 = 9x - 15
4x + 31 = 9x - 15
31 = 9x - 4x - 15
31 = 5x - 15
46 = 5x
x = 9 1/5 = 9.2

You want 9x - 15
9*9.2 - 15
82.8 - 15
67.8 <<<<< answer. 
If I have given the wrong meaning to 2-1 (which could mean 1) leave another note and I will correct my work. 
8 0
3 years ago
What is the equation of this line in standard form? −8x+7y=25 −9x+8y=−23 −8x+9y=−23 −8x+9y=23
kvasek [131]
<span>−8x+7y=25 is already in standard form, altho some people would prefer to re-write it as

</span><span>−8x+7y-25 = 0.

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5 0
3 years ago
Will give brainliest! Please explain how I solve the ratio 16/32=12/24
goldenfox [79]

To solve, simply simplify each fraction

(16/32)/(16/16) = 1/2

(12/24)/(12/12) = 1/2

True, the equation given to us is true.

hope this helps

8 0
3 years ago
Read 2 more answers
Plz help fifty points
likoan [24]

Answer:

for question 13

  1. 130
  2. 50
  3. 50
  4. 130
  5. 130
  6. 50
  7. 50
  8. 130

Step-by-step explanation:

for 14

    x. 150

    y. 15

    z. 150

i cant say that this is totally correct but im taking a educated guess

7 0
2 years ago
Read 2 more answers
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