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2 years ago

What is -2(-6+1)=-2x-2(-5-x)

Mathematics

1 answer:

jeka57 [31]2 years ago

6 0

-2 ( -6 + 1 ) = -2x - 2 ( -5 - x )

12 - 2 = -2x + 10 + 2x

10 = 10

x is all real numbers

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marusya05 [52]

$\large\underline{\sf{Solution-}}$

We have to find out the value of the fraction.

Let us assume that:

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We can also write it as:

$\sf \longmapsto x =2 + \dfrac{1}{x}$

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$\sf \longmapsto\begin{cases} \sf a =1 \\ \sf b = - 2 \\ \sf c = - 1 \end{cases}$

By quadratic formula:

$\sf \longmapsto x = \dfrac{ - b \pm \sqrt{ {b}^{2} - 4ac } }{2a}$

$\sf \longmapsto x = \dfrac{2 \pm \sqrt{ {( - 2)}^{2} - 4(1)( - 1)} }{2 \times 1}$

$\sf \longmapsto x = \dfrac{2 \pm \sqrt{4 + 4} }{2 \times 1}$

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$\sf \longmapsto x = \dfrac{2 \pm2 \sqrt{2} }{2}$

$\sf \longmapsto x = 1 \pm\sqrt{2}$

$\sf \longmapsto x = \begin{cases} \sf 1 + \sqrt{2} \\ \sf 1 - \sqrt{2} \end{cases}$

But "x" cannot be negative. Therefore:

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(step 1) (6a+5)(a-1)=0

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answer is
a= -5/6 or a= 1
i hope this helps! ;)

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It is 25.

Q1 is 8
Q3 is 33

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