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lilavasa [31]
3 years ago
7

Solution of equation x^2-2x=-2

Mathematics
1 answer:
denis23 [38]3 years ago
5 0

Answer:

x=1\pm i

Step-by-step explanation:

The given equation is :

x^2-2x=-2\\\\x^2-2x+2=0

The above equation is a quadratic equation whose solution can be given by :

x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}

Here,

a = 1, b = -2 and c = 2

So,

 x=\dfrac{-(-2)\pm \sqrt{(-2)^2-4(1)(2)} }{2(1)}

So,

x=1+i,1-i\\\\x=1\pm i

So, the solution of the equation is 1\pm i.

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Sayyida has a circular garden of radius 21m. She ran round the garden twice. what distance did she cover?​
yawa3891 [41]

answer

C = 263.76 m

Step-by-step explanation:

C = 2×pi×r

C = 2×3.14×21

C = 131.88 m

For 2 rounds,

C = 131.88 x 2

C = 263.76 m

7 0
3 years ago
What's cot(-180)<br><img src="https://tex.z-dn.net/?f=%20%5Ccot%28%20-%20180%29%20" id="TexFormula1" title=" \cot( - 180) " alt=
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4 years ago
Which triangles must be congruent
Alex17521 [72]
All three triangles are congruent by SAS
6 0
4 years ago
Eliminate the parameter in the equations x = 5cos(t) – 7 and y = 5sin(t) 9. how can the rectangular equation be described?
Maksim231197 [3]

Recall that for all t,

cos²(t) + sin²(t) = 1

Now,

x = 5 cos(t) - 7   ⇒   (x + 7)/5 = cos(t)

y = 5 sin(t) + 9   ⇒   (y - 9)/5 = sin(t)

so that substituting into the identity above, we get

((x + 7)/5)² + ((y - 9)/5)² = 1

which we can rewrite as

(x + 7)²/25 + (y - 9)²/25 = 1

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and this is the equation of a circle centered at (-7, 9) with radius 5.

3 0
2 years ago
Liana is studying the activity of nurse sharks. She starts at a position that is 25 feet below sea level. She rises 9 feet, then
Reil [10]

Answer:

I believe the answer is -28

Step-by-step explanation

I gotchu bro

The answer is -28 because Liana starts at 25 below sea level (which is the same thing as -25) If she rises 9 feet, then you know to add because she is going up so your just gonna add. Next she descends 12 feet, so she went down, so subtract. So i know the answer is going to be -28 because -25+9 is -16, then imma subtract -16 and 12 so, -16 - 12= -28. There ye go

6 0
3 years ago
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