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Stells [14]
3 years ago
13

Factor this polynomial completely. x^2-81

Mathematics
2 answers:
expeople1 [14]3 years ago
7 0

The answer to your question is (x+9)(x-9)

Step-by-step explanation:

Rewrite 81 as 92

x2−92

Since both terms are perfect squares, factor using the difference of squares formula, a2−b2=(a+b)(a−b)

where a=x and b=9

(x+9)(x−9)

Hope this helped you out:)

ikadub [295]3 years ago
4 0

Answer:

a=x and b=9

(x+9)(x−9)

Explanation:

Since both terms are perfect squares, factor using the difference of squares formula, a2−b2=(a+b)(a−b)

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3 years ago
If a=12 and 120% of a is equal to 80% of b then what is a+b
mojhsa [17]
A=12
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8 0
2 years ago
Wht is 39% of 1,200? I can't understand it
Gennadij [26K]
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