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Andrews [41]
3 years ago
10

Find the product. (3p – 7)(3p + 7)

Mathematics
2 answers:
hram777 [196]3 years ago
8 0
(3p - 7)(3p + 7) =
(3p × 3p) + (3p × 7) + (-7 × 3p) + (-7 × 7) =
9p^2 + 21p - 21p - 49
= 9p^2 - 49

Therefore, answer would be D.
aleksandrvk [35]3 years ago
3 0

Answer:

Step-by-step explanation:

to multiply the two factors we can use the concept of FOIL

so when we multiply the (3p – 7)(3p + 7)

we get

(3p -7)(3p + 7) = 3p.3p+3p.7-3p.7-7.7

9p^2-21p+21p-49 (cancel the 21p)

9p^2-49

correct option is D.

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Answer:

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Step-by-step explanation:

This question is an example of a compound percentage decrease.

To work this out you would first need to convert the percentage of 25 into a decimal. You can do this by dividing the percentage of 25 by 100, this gives you 0.25. This is because percentages are out of 100.

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