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sdas [7]
4 years ago
15

Fine the difference (2ab-5a-7)-(-5ab-7)

Mathematics
2 answers:
svlad2 [7]4 years ago
5 0
Okay so the difference to this is <span><span>7a</span>b</span>−<span>5<span>a
The way I got that is I distributed the negative signs, subtracted them from both sides, and after that I combined like terms and I got exactly that answer: </span></span><span><span>7a</span>b</span>−<span>5<span>a</span></span>
Mars2501 [29]4 years ago
3 0
7ab-5a
-------------------------------------
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Answer:

Step-by-step explanation:

given the expression;

cos(2x) = cos(x)

According to trig identity;

cos(2x) = cos(x+x)

cos(2x) = cos x cos x - sinx sinx

cos(2x) = cos²(x)-sin²(x)

cos(2x) = cos²(x)-(1-cos²x)

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cos(2x) = 2cos²(x)-1

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let P = cosx

2P²-1 = P

2P²-P-1 = 0

Factorize;

2P²-2P+P-1 = 0

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2P - 1 = 0 and P-1 = 0

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cosx = 1/2 and cos x = 1

x = arccos 1/2

x = π/3

Also;

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4 0
3 years ago
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BlackZzzverrR [31]

Answer:

Step-by-step explanation:

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3 years ago
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4 years ago
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Ivanshal [37]

Answer:

Step-by-step explanation:

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it went down 8

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4 years ago
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kozerog [31]

Answer:

21 Years Ago

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61 - 21 = 40

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