2 years ago

PLZ SOLVE, NEED DONE BY 3:15!!!!!!!!!

Mathematics

1 answer:

Oliga [24]2 years ago

3 0

Answer:

Train A - 80

Train B - 85

Train B is faster.

Step-by-step explanation:

Hope this helps! Pls give brainliest!

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2(5-8x-9x)+4(7x+7)=14

xenn [34]

Step-by-step explanation:

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3 years ago

Just 6-8 pls n thx.......

alex41 [277]

6 minus 8 equals -2.

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3 years ago

What are all of the real roots of the following polynomial? f(x) x^4-24x^2-25

Greeley [361]

Answer:

x = ±5

Step-by-step explanation:

We are given the following polynomial function and we are to find all of its real roots:

$x^4-24x^2-25$

Let $y=x^2$ so we can now write it as:

$y^2-24y-25$

Factorizing it to get:

$(y^2+y)+(-25y-25)$

$y\left(y+1\right)-25\left(y+1\right)$

$\left ( y + 1 \right ) \left ( y - 2 5 \right)$

Substitute back $y=x^2$ to get:

$\left ( x^2 + 1 \right ) \left ( x^2 - 25 \right )$

$\left ( x^2 + 1 \right ) \left ( x + 5 \right ) \left ( x - 5 \right )$

The quadratic factor has only complex roots. Therefore, the real roots are x = ±5.

3 0

3 years ago

Read 2 more answers

22 must lie between the whole numbers and

Crazy boy [7]

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3 years ago

Factor the following, I will give 5 stars and thanks.

tigry1 [53]

Answer:

13) $n=-3,-7$

14) $b=-4,-8$

15) $m=-7$

16) $a=-5,-7$

Step-by-step explanation:

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2 years ago