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Lubov Fominskaja [6]
3 years ago
13

(r^3+6r^2-21r-18) ÷ (r-3) Show in Synthetic Division

Mathematics
2 answers:
Kipish [7]3 years ago
8 0

Answer:

r² + 9r + 6

Step-by-step explanation:

+3|  +1    +6   -21   -18

   |<u>         +3   +27  +18</u>  

      +1    +9    +6     0

Answer:

=1r² +9r + 6 + 0

=r² +9r + 6    (simplified)

Read on if you want to know how it was done.

To do synthetic division, you first need to get the constant of the divisor and change the sign.

Then list the coefficients of the dividend.

Drop the first coefficient.

Multiply it by the divisor, and write the answer under the next coefficient and add. Repeat till the end.

The answer should be one degree less, the original polynomial.

mixas84 [53]3 years ago
4 0

For this case we must build a quotient such that when multiplied by the divisor, it eliminates the terms of the dividend until it reaches the remainder.

According to the figure we have that the quotient is:

r ^ 2 + 9r + 6

Answer:

Quotient:

r ^ 2 + 9r + 6

See attached image

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11. 3/4 of 12=<br> 12. 6/7 of 49<br> 15. 2/3x27<br> 16. 3/8 x 16
Zarrin [17]

Step-by-step explanation:

3/4 of 12

3/4 × 12 = 9

6/7 of 49

6/7 × 49 = 42

2/3 × 27 = 18

3/8 x 16 = 6

8 0
3 years ago
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balu736 [363]

Answer:

under

Step-by-step explanation:

change the underminator, we have

7×(x-2)-4×(3x+5)=-3×7×4

7x-14-12x-20=-84

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6 0
3 years ago
12 is 80% of what number
nydimaria [60]
X - the number

80\%x=12 \\&#10;\frac{80}{100}x=12 \\&#10;\frac{4}{5}x=12 \\&#10;x=12 \times \frac{5}{4} \\&#10;x=3 \times 5 \\&#10;x=15

12 is 80% of 15.
3 0
3 years ago
Read 2 more answers
Please helppp me!!!!!
Scrat [10]

Answer:

Step 2 contains error in the given problem.

Step-by-step explanation:

Given expression is:

\frac{1}{2}x-3=\frac{1}{3}x+6

Step 1: identifying the LCM.

The LCM identified is 6.

This step is correct.

In the next step, we multiply the LCM with each term of the equation.

Step 2:

\frac{6}{1}(\frac{1}{2}x) -3 =\frac{6}{1}(\frac{1}{3}x)+6

However,

In the given solution, the LCM is not multiplied with each term.

Hence,

Step 2 contains error in the given problem.

7 0
3 years ago
Is it essary to rename 4 1/4 if you subtract 3/4 from it.
Archy [21]
No . because you would then have 2/4 which is 1/2 50%

3 0
3 years ago
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