Answer:
x³ - (√2)x² + 49x - 49√2
Step-by-step explanation:
If one root is -7i, another root must be 7i. You can't just have one root with i. The other roos is √2, so there are 3 roots.
x = -7i is one root,
(x + 7i) = 0 is the factor
x = 7i is one root
(x - 7i) = 0 is the factor
x = √2 is one root
(x - √2) = 0 is the factor
So the factors are...
(x + 7i)(x - 7i)(x - √2) = 0
Multiply these out to find the polynomial...
(x + 7i)(x - 7i) = x² + 7i - 7i - 49i²
Which simplifies to
x² - 49i² since i² = -1 , we have
x² - 49(-1)
x² + 49
Now we have...
(x² + 49)(x - √2) = 0
Now foil this out...
x²(x) - x²(-√2) + 49(x) + 49(-√2) = 0
x³ + (√2)x² + 49x - 49√2
Answer: 12x + 9
Step-by-step explanation:
<u>Given </u>
(6 + 5x) + (7x + 3)
<u>Put like terms together</u>
=5x + 7x + 6 + 3
<u>Combine like terms </u>
=
Hope this helps!! :)
Please let me know if you have any questions
The answer is 56
hope this helps (:
Answer:
No.
Step-by-step explanation:
Sweet Potatoes= 0.79 Per pound including tax.
So 0.79 · 8 = $6.32
And Stuart only have $5.00.
Therefore He don't have enough money for 8 pound of sweet potatoes.
