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Paraphin [41]
3 years ago
11

Find a polynomial equation that has double zeros at x = -1, and x = 8.

Mathematics
2 answers:
blondinia [14]3 years ago
3 0

Answer:

x^2-7x+8=0

Step-by-step explanation:

(x+1)(x-8)=0

x^2-7x+8=0

3241004551 [841]3 years ago
3 0
x^2-7x+8=0 is what i got.
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Complex root of x^2+3x+9=0
Luden [163]

\text{Quadratic formula}

ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\x_1=\dfrac{-b-\sqrt\Delta}{2a};\ x_2=\dfrac{-b+\sqrt\Delta}{2a}

-----------------------------------------------------------------------

x^2+3x+9=0\\\\a=1;\ b=3;\ c=9\\\\\Delta=3^2-4(1)(9)=9-36=-27\\\\\sqrt\Delta=\sqrt{-27}=\sqrt{(27)(-1)}=\sqrt{27}\cdot\sqrt{-1}=\sqrt{9\cdot3}i=\sqrt9\cdot\sqrt3i=3\sqrt3i

x_1=\dfrac{-3-3\sqrt3i}{2(1)}=-\dfrac{3}{2}-\dfrac{3\sqrt3}{2}i\\\\x_2=\dfrac{-3+3\sqrt3i}{2(1)}=-\dfrac{3}{2}+\dfrac{3\sqrt3}{2}i


i=\sqrt{-1}

6 0
3 years ago
I need these done ASAP! do the properly for brainliest!
Vlad [161]

I can answer the slopes

Answer:

1. would have a slope of 2

2. would have a slope of -1.66

3.would have a slope of 0

4. would have a slope of -13

Step-by-step explanation:

(Y2 - Y1) / (X2 -X1)

1. (9-5) / (4-2) = 4 / 2 =2

2. (-5-5) / (3 - -3) = -10 / 6 = 1.66

3. (2 - 2) / (5 - -4) = 0 / 9 = 0

4. (-7 - 6) / (3 - 3) = -13 / 0 = -13

8 0
3 years ago
1. What is the simplified form of the following expression? <br><br> 12x
eimsori [14]

12x² - 3.5y + 10y + 1.5x² + y       Combine like terms

13.5x² + 7.5y

3 0
3 years ago
A upermarket owners cost for a 26 ounce can of coffee is 6.75. A case of coffee contains 12 cans. What profit is earned for each
VladimirAG [237]

Answer:

The correct answer is 32.88.

Step-by-step explanation:

Cost price for a 26 ounce can of coffee = 6.75.

A case of coffee contains 12 cans.

Total cost price of a case is 12 × 6.75 = 81.

Selling price of each can of coffee = 9.49.

Total selling price of a case is 12 × 9.49 = 113.88.

Total profit for selling a case of cnas of coffee is given by 113.88 - 81 = 32.88

Thus the profit for selling each can is 32.88.

4 0
3 years ago
Perry designed the murals by drawing small sketches first. His sketch for a mural measures 5 inches wide by 7 in. tall. If he wa
Harlamova29_29 [7]

Answer:

90

Step-by-step explanation:

5 0
3 years ago
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