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KIM [24]
4 years ago
11

How do we prove this?

Mathematics
1 answer:
Tresset [83]4 years ago
6 0
Cos(x+2x) + cosxcos2x - sinxsin2x
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Write the product in standard form (2x + 5) ^2
Iteru [2.4K]

Answer:

4x^2+20x+25

Step-by-step explanation:

(2x+5)^2 = (2x+5) (2x+5)

Using the foil method : 2x(2x) = 4x^2

(2x) (5) = 10x

(2x) (5) = 10x

5 (5) = 25

Combine like terms

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3 years ago
Not a math question but they dont have a PE subject (math nerd who dont know sports needs help)
eduard

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i think its cancellation the others don't make sense.

Step-by-step explanation:

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Mkey [24]
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Graph (-4, 5), (2, 3), (-3.0), (-4. -5). (-5. 2), and (-5,3) and connect the points to form a polygon. How many sides does the p
kykrilka [37]

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I think the sides of polygon are 6

Step-by-step explanation:

Because to form a polygon we need to the first to form a horizontal and vertical line,to find the number in that line,and join the line based on the numbers given, then you will get a polygon with 6 side

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Who had the quickest average time per mile?
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