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Evgen [1.6K]
4 years ago
9

I need help with number 21 please!

Mathematics
1 answer:
seraphim [82]4 years ago
6 0
The coordinate point is 8
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What polynomial can be factored to give (a + 4) ( a - 4) ?​
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(a+4)(a-4)=a²-4²   ITS LIKE THIS BECAUSE ITS AN IDENTITY,

               ⇒a²-16

Even when we solve it by the regular method of solving polynomials we get a²-16 as answer as there and thats the proof for the identity.

(a+b)(a-b)=a(a-4)+4(a-4)

⇒a²-4a+4a-16

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Thus we can see that a²-16 is the answer we get when we try to solve it by regular polynomial solution tooo.

And a²-16 is the polynomial from which we get (a+4)(a-4)

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