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lyudmila [28]
3 years ago
11

If f(x)=x³-2x², which expression equivalent to f(i)?

Mathematics
1 answer:
ICE Princess25 [194]3 years ago
7 0

Answer:

f(x) = x³ - 2x²

=>

f(i) = i³- 2i²

Hope this helps!

:)

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Select and use the most direct method to solve 2x(x + 1.5) = -1. Describe and justify the methods you used to solve the quadrati
miskamm [114]

Step-by-step explanation:

Given that,

A quadratic equation,

2x(x + 1.5) = -1

We need to solve the quadratic equation. Firstly we need to simplify the above equation to form it as ax^2+bx+c=0.

So,

2x^2+3x=-1\\\\2x^2+3x+1=0

Here, a = 2, b = 3 and c = 1

The roots of the given equation can be given by :

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

Putting all the values we get :

x=\dfrac{-b\pm \sqrt{b^2+4ac} }{2a}, \dfrac{-b\pm \sqrt{b^2-4ac} }{2a}\\\\x=\dfrac{-3\pm \sqrt{3^2+4(2)(1)} }{2(2)}, \dfrac{-3\pm \sqrt{3^2-4(2)(1)} }{2(2)}\\\\x=\dfrac{-3+1}{4}, \dfrac{-3-1}{4}\\\\x=-\dfrac{1}{2}, -1

So, the roots of the given equation is -1/2 and -1.

5 0
3 years ago
Find the distance between each pair of points.If necessary round to the nearest tenth
Dovator [93]

Answer:

Step-by-step explanation:

22) J(2,-1); K(2,5)

Distance = √(x₂-x₁)² + (y₂-y₁)²

                = √( 2- 2)² + (5 - [-1] )²

                = √0 + (5  + 1 )²

                =√ ( 6 )²   = 6

25) A(0,3) ; B (0,12)

distance =√(0-0)² + (12 - 3 )²

              =√( 9)²  = 9

28) Q(12,-12) ; T(5,12)

distance = √(5 - 12)² + (12 - [-12] )²

              = √( -7)² + (12 + 12] )²

              = √ 49 + (24)²

              = √ 49 + 576

               = √625

                 =25

                 

                 

                                     

                 

3 0
3 years ago
Look at both images. 40 points. WILL MARK BRAINLIEST!
joja [24]

Answer:

I,m not sure but I tried my best I think it's c

Step-by-step explanation:

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2 years ago
HELP WITH BOTH PLEASE ASAP URGENT BRAINIEST TO CORRECT ANSWER!!!!!!!
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8 0
3 years ago
A regular octagonal pyramid has a base edge of 3m and a lateral area of 60m^2. Find its slant height.
Olin [163]
Octagon = 8-side polygon

<u>Find area of 1 triangle:</u>
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<u>Given area and length, find height:</u>
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4 0
3 years ago
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