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Pachacha [2.7K]
3 years ago
15

I used a calculator and have solved it without. I didn't get any of these answers. HELP

Mathematics
1 answer:
Andreas93 [3]3 years ago
6 0

Answer:

-9 + 7√5.

Step-by-step explanation:

(3 - √5)(2 + 3√5)

= 3(2 + 3√5) - √5(2 + 3√5))

= 6 + 9√5 - 2√5 - 15

= -9 + 7√5.

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b=2

Step-by-step explanation:

15b+10b=50

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2 years ago
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Evaluate 4b-a when a=12 and b=7
Ilia_Sergeevich [38]

Answer:

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Step-by-step explanation:

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arsen [322]

Answer:

(6, 5)

Step-by-step explanation:

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2 years ago
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Does the set {t, t Int} form a fundamental set of solutions for t^2y" -- ty' +y = 0?
Ivanshal [37]

Answer:

yes

Step-by-step explanation:

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To find  the solutions are independent or dependent we use wronskain

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If wrosnkian is not equal to zero then solutions are dependent and if wronskian is zero then the set of solution is independent.

Let y_1=t,y_2=t ln t

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w(x)=t(lnt+1)-tlnt=tlnt+t-tlnt=t where t is not equal to zero.

Hence,the wronskian  is not equal to zero .Therefore, the set of solutions is independent.

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3 years ago
X^2+21x+20 <br><br> I need help
Ratling [72]

Answer: (x+20) (x+1)

Step-by-step explanation:

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