3 years ago

2 questions plz Both will be in the comments

Mathematics

1 answer:

lesantik [10]3 years ago

7 0

The two questions aren’t there?

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Solve 2x^3+7x^2-2x-1=o

Mashcka [7]

Answer:

$x=\sqrt{3}-2\\x=-\sqrt{3}-2\\x=\frac{1}{2}$

Step-by-step explanation:

This is a hard one

We have to use the rational root theorem

$2x^3+7x^2-2x-1$ = 0

We have to find all the factors of a and d and put them in a fraction

$a=2\\d=-1\\\frac{1}{1,2}$

We then plug them into the equation to see if any of them work

The equation isn't true when plugging 1, but is true when plugging in 1/2

factored form of 1/2 is (2x-1)

Then we divide the original equation by (2x-1) (you can use synthetic division or long division, it would be hard to type out the process for that) to get $x^2+4x+1$

So now the equation is $(2x-1)(x^2+4x+1)$

Solve the second half of this equation using the quadratic formula to get

$\sqrt{3}-2$ and $-\sqrt{3}-2$

We already know the solution for the first half of the equation (1/2)

So the final answers are:

$x=\sqrt{3}-2, -\sqrt{3}-2, \frac{1}{2}$

8 0

3 years ago

HELP PLEASE WILL LEAVE GOOD REVIEW.

AleksandrR [38]

Answer:

Step-by-step explanation:

He needs 2.5 cm of ribbon left or in easier words 6 cm..-

5 0

3 years ago

What is 49,736 to the nearest thousands?

brilliants [131]

50,000
Since 736 is $\geq$ 500, we round it off to 50 000 instead of 49000.

5 0

3 years ago

What is the sum of the fractions? Use the nurnber line and equivalert fractions to help find the answer.

alukav5142 [94]

Answer:

-3/4

Step-by-step explanation:

-5/4 + 2/4 = -3/4

Hope this helps :)

7 0

3 years ago

I suck at math so I'm gunna ask a bunch of questions on this work

Nastasia [14]

It would be c plz mark me brainliest

3 0

4 years ago

2 questions plz Both will be in the comments​

2 questions plz Both will be in the comments