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EleoNora [17]
3 years ago
12

Solve for x in the equation x2-12x+59=0.

Mathematics
2 answers:
laila [671]3 years ago
5 0

\frac{-b+-\sqrt{b^2-4ac} }{2a}; ax^2+bx+c \\ \\ a=1, b=-12, c=59

Use the formulas above to solve the equation.

1x^2-12x+59=0\\ \\ \frac{-(-12)+-\sqrt{(-12)^2-4(1)(59)} }{2(1)}\\ \\ \frac{12+-\sqrt{144-236} }{2}\\ \\ \frac{12+-\sqrt{-92} }{2}

Now this problem will be giving i values since there's a negative in the square root. These i's are known as imaginary numbers. For the answer it should be these two:

x =(12-\sqrt{-92})/2=6-i\sqrt{23} = 6.0000-4.7958i

x =(12+\sqrt{-92})/2=6+i\sqrt{23} = 6.0000+4.7958i

Let me know if you need help with finding i and all or if you just needed the answer to check your work. Hope this helps!

Svetllana [295]3 years ago
4 0
I think it is -5.9. Sorry if I'm wrong.
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7/8 + (-2/3)
irakobra [83]

Ok, lets start with the top.

7/8 + (-2/3)

Thats equal to

7/8 - 2/3

The common denominator will be 24

21/24 - 16/24

Subtract

5/24

Now, to divide you multiply by the reciprocal, so

5/24 / 5/6

Becomes

5/24 * 6/5

Cross simplify and get your answer

1/4

7 0
3 years ago
The espression 4x^2-4x-120 is equivalent to?
Vadim26 [7]
Glad you know how to use the ^ feature :) it helps alot!

Answer: <span><span>4<span>(<span>x<span>−6</span></span>)</span></span><span>(<span>x+5</span>) </span></span>
5 0
4 years ago
Simplify <br><br><br> (-4-6i)+(3i)-(8-i)<br><br><br><br> show work please
stich3 [128]
Remove parentheses:

-4 - 6i + 3i - 8 + i
Combine common terms
-12 -2i
4 0
3 years ago
what is an equation of the line that is perpendicular to y + 1 = -3(x-5) and passes through the point (4, 6)
Korolek [52]

\text{Let}\ k:y=m_1x+b_1\ \text{and}\ l:y=m_2x+b_2,\ \text{then}\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\\\l\ \parallel\ k\iff m_1=m_2\\\\\text{We have}\ y+1=-3(x-5)\to m_1=-3.\\\\\text{Therefore}\ m_2=-\dfrac{1}{-3}=\dfrac{1}{3}.\\\\\text{The point-slope form:}\ y-y_1=m(x-x_1).\\\\\text{Put the value of slope and the coordinates of the point (4, 6) to the equation}:\\\\\boxed{y-6=\dfrac{1}{3}(x-4)}

8 0
3 years ago
A card is drawn randomly from a standard 52-card deck. Find the probability of the given event.
Marina CMI [18]

Step-by-step explanation:

There are 52 cards in a standard deck.

a) There are four 5s (one for each suit), so the probability is 4/52 or 1/13.

b) There are twelve face cards (three for each suit), so the probability is 12/52 or 3/13.

c) There are 40 non-face cards, so the probability is 40/52 or 10/13.

5 0
3 years ago
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