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Sedaia [141]
3 years ago
12

Plz help me!!!!!!!!!!!!

Mathematics
1 answer:
Mashutka [201]3 years ago
7 0

Answer:  3, -3, 3i, -3i

<u>Step-by-step explanation:</u>

<u>x^4-81=0\\\\Factor:\\(x^2-9)(x^2+9)=0\\(x-3)(x+3)(x^2+9)=0\\\\\text{Apply the Zero Product Property:}\\x-3=0\qquad x+3=0\qquad x^2+9=0\\\boxed{x=3}\qquad \qquad \boxed{x=-3}\qquad \quad x^2=-9\\.\qquad \qquad \qquad \qquad \qquad \qquad x=\sqrt{-9}\\.\qquad \qquad \qquad \qquad \qquad \qquad \boxed{x=\pm 3i}</u>

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charle [14.2K]
I think it's 1/2, which is 6/12.

5/12 plus 1/12 equals 6/12. 6 is half of 12, so you one half. I hoped this helped.
5 0
2 years ago
Use the variable x to write the phrase in symbols.
Rudik [331]

Answer:

155 + x^{3} + 14

Step-by-step explanation:

The variable x would represent the number/value we don't know, and in this case, we don't know what number is raised to the third power. This being said, x would represent that number.

The question, although worded a bit confusingly, asks to add 155, the number (x) to the exponent of 3, and 14. Mathematically, this would be 155 + x^{3} + 14.

6 0
3 years ago
How many eigths are in 1/4 and how many tenths are in1/2
Hitman42 [59]
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3 years ago
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shtirl [24]
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ALWAYS set equation equal to zero, which in this case has already been done for us.

Step two:
Figure out what formula you need to use in order to solve in this case I'd use the Quadratic formula.

a=1
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c=2

Quadratic formula:
x =  \frac{ - b +  -  \sqrt{(b) ^{2}  - 4(a)(c)} }{2(a)}
Then you would plug in the information.
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The solve for what is underneath the square root ONLY.
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x =   \frac{ - 9 +  \sqrt{73} }{2}
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3 0
3 years ago
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Nataly [62]

Answer:

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6 0
3 years ago
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