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Evgen [1.6K]
3 years ago
13

Could u please help

Mathematics
1 answer:
Kisachek [45]3 years ago
7 0

Answer:

The answer is C,(x^2+2)(x+7)

Step-by-step explanation:

x3 + 7x2 − 2x − 14.

We will group the terms.

Make pairs of the terms:

(x3 + 7x2 ) - (2x + 14.)

Now find the common factor of each pair

x^2(x+7)-2(x+7)

(x^2-2)(x+7)

Thus the factors of x3 + 7x2 − 2x − 14. are (x^2-2)(x+7)

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MArishka [77]

Answer:

x= \frac{3-3\sqrt{7}i }{4} and x= \frac{3+3\sqrt{7}i }{4}

Step-by-step explanation:

We have to solve the given equation - 2x² + 3x - 9 = 0

To solve the equation given above we have to factorize the left-hand side of the equation.

But it can not be factorized. So, use the Sridhar Achaya formula.

Therefore, x= \frac{-3 + \sqrt{3^{2}-4 \times (-2) \times (-9) } }{2\times (-2)} and x= \frac{-3 -\sqrt{3^{2}-4 \times (-2) \times (-9) } }{2\times (-2)}

So,  x= \frac{3-3\sqrt{7}i }{4} and x= \frac{3+3\sqrt{7}i }{4} {Where i=\sqrt{-1}}

Therefore, the solutions are imaginary numbers. (Answer)

Note: The Sridhar Acharya Formula gives if ax² + bx + c = 0, then the roots of the equation are x = \frac{-b + \sqrt{b^{2}-4ac } }{2a} and x = \frac{-b - \sqrt{b^{2}-4ac } }{2a}.  

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4 years ago
What is the value of b in the equation below? 9^-8 x 9^-2 = a^b <br> -10 <br> -6 <br> 9 <br> 16
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Answer:

-10

Step-by-step explanation:

9^-8 x 9^-2 = a^b

We know that x^y * x^z = x^(y+z)

9^-8 x 9^-2 = 9^(-8+-2) = 9^(-10)

a= 9  

b = -10

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Answer:

If an angle of one triangle is congruent to the corresponding angle of another triangle and the lengths of the sides including these angles are in proportion, the triangles are similar. The corresponding sides of similar triangles are in proportion.

I hope this might help you

Mark it as brainliest answer and follow me

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