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Len [333]
2 years ago
13

Perform the indicated operation. (3a2 - 7xy)(3a2 + 7xy)

Mathematics
2 answers:
Naily [24]2 years ago
8 0

(3a² - 7xy)(3a² + 7xy) =

= (3a²)² - (7xy)²

= 9a⁴ - 49x²y²

Use

a² - b² = (a - b)(a + b)

raketka [301]2 years ago
8 0

Answer:

9a^4 - 49x^2y^2.

Step-by-step explanation:

(3a^2 - 7xy)(3a^2 + 7xy)

This is example of the difference of 2 squares:

(a + b)(a - b) = a^2 - b^2,  so the answer is:

(3a^2)^2 - (7xy)^2

= 9a^4 - 49x^2y^2.

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Sustituir. 20c + 15r + 75p + 50e​
AVprozaik [17]

Answer:

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Step-by-step explanation:

Subtract (20c + 15r + 75p + 50e) - (12c + 22r + 65p + 70e)

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Open bracket

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Collect like terms

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3 0
3 years ago
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agasfer [191]

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7 0
2 years ago
adams car can travel 450 miles on a full tank of gas. his gas tank can hold 15 gallons. kennys car can travel 416 miles on a ful
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