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Mars2501 [29]
3 years ago
9

How do you use the Descartes' Rule of Signs?

Mathematics
1 answer:
sp2606 [1]3 years ago
8 0

use the number it and equation it with number and new number will form

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What is 100 divided by 21
aliina [53]
100 divided by 21 is 4.7619047619 what can round to be 4.76
7 0
3 years ago
How many terms in the<br> sequence are less than 100?
Vaselesa [24]

Answer:

99

Step-by-step explanation:

Since given, < 100.

So,

100 - 1 = 99

5 0
2 years ago
WHAT IS X³-27 SIMPLIFIED
Eduardwww [97]

Answer:

<u>It</u><u> </u><u>is</u><u> </u><u>(</u><u>x</u><u> </u><u>-</u><u> </u><u>3</u><u>)</u><u>³</u><u> </u><u>-</u><u> </u><u>9</u><u>x</u><u>(</u><u>3</u><u> </u><u>-</u><u> </u><u>x</u><u>)</u>

Step-by-step explanation:

Express 27 in terms of cubes, 27 = 3³:

=  {x}^{3}  -  {3}^{3}

From trinomial expansion:

{(x - y)}^{3}  = (x - y)(x - y)(x - y) \\

open first two brackets to get a quadratic equation:

{(x - y)}^{3}  = ( {x}^{2}  - 2xy +  {y}^{2} )(x - y)

expand further:

{(x - y)}^{3}  =  {x}^{3}   - y {x}^{2}  - 2y {x}^{2}  + 2x {y}^{2}  + x {y}^{2}  -  {y}^{3}  \\  {(x - y)}^{3}  =  {x}^{3}  -  {y}^{3}  + 3x {y}^{2}  - 3y {x}^{2}  \\  {(x - y)}^{3}  =  {x}^{3}  -  {y}^{3}  + 3xy(y - x) \\  \\ { \boxed{( {x}^{3} -  {y}^{3} ) =  {(x - y)}^{3}   - 3xy(y - x)}}

take y to be 3, then substitute:

( {x}^{3}  - 3^3) =  {(x - 3)}^{3}  - 9x(3 - x)

5 0
3 years ago
how do you solve 2e - 12 = 7e + 8? i got 4 but the answer key says it's -4. what do you subtract from both sides?
ella [17]
First you subtract -2e from both side
7 0
2 years ago
Read 2 more answers
M AEB = 37°, what is m CED?
Oksana_A [137]
Answer: 53 degree

Explanation:

AEB + BEC + CED = 180 degree
37 + 90 + CED = 180
CED = 180 - 127
CED = 53 degree
6 0
3 years ago
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