Ask question

Ask question

All categories

3 years ago

6

Solve the quadratic equation: 3x^2+x-5=0

1 answer:

adell [148]3 years ago

4 0

3x²+x-5=0

a = 3, b = 1, c= -5

-> ∆ ( delta ) = b²-4ac = 61 > 0

-> x1 =( -b+√∆ )÷ 2a =...

x2 = (-b-√∆)÷2a =...

p/s: do your teachers teach you how to use ∆ ( delta ) in maths calculation ? i live in europe and our teachers teach us that way. however, it is a rịght and fast way. you should learn it.

You might be interested in

<img src="https://tex.z-dn.net/?f=%5Cfrac%7B%28csc%20x%2B1%29%28csc%20x-1%29%7D%7Bcsc%5E2x%7D%5C%5C" id="TexFormula1" title="\fr

tigry1 [53]

Step-by-step explanation:

$\frac{( \csc x+1)( \csc x-1)}{ \csc ^2x} = \frac{ { \csc }^{2} x - 1}{ \csc^{2} x} \\ = 1 - \sin^{2} x = \cos^{2} x \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

b. Since csc theta = 1/sin theta, we can multiply both sides by sin theta and you will end up with

$\cos^{2} \theta + \sin^{2} \theta = 1$

which is an identity.

7 0

3 years ago

How much kinetic energy is possessed by a 12 kg remote controlled car that is traveling with a speed of 5 m/s?

Marianna [84]

Answer: 150 Kg $m^{2}$ / $s^{2}$

Step-by-step explanation:

K.E = $\frac{1}{2}$ m $v^{2}$

K.E = $\frac{1}{2}$ X 12 X 25

K.E = 150

7 0

3 years ago

Read 2 more answers

Answer needed quick <br> is it <br> supplementary<br> vertical<br> complementary <br> adjacent

Archy [21]

<em><u>Hey</u></em><em><u>!</u></em><em><u>!</u></em>

<em><u>They</u></em><em><u> </u></em><em><u>are</u></em><em><u> </u></em><em><u>adjacent</u></em><em><u> </u></em><em><u>angles</u></em><em><u>.</u></em>

<em><u>Both</u></em><em><u> </u></em><em><u>angles</u></em><em><u> </u></em><em><u>have</u></em><em><u> </u></em><em><u>common</u></em><em><u> </u></em><em><u>side</u></em><em><u> </u></em><em><u>and</u></em><em><u> </u></em><em><u>vertex</u></em><em><u>.</u></em>

<em><u>Hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>will</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

8 0

3 years ago

Read 2 more answers

Help plz. It's long division

Anit [1.1K]

OOOOH my favorite LONG DIVISION but anyways the answer is 164.4

3 0

3 years ago

Read 2 more answers

Can someone help me with this I’m trying to find the perimeter

slamgirl [31]

Answer:

24

Step-by-step explanation:

Just plug each number in calculator and do multiply buy 3 and divide by 4 then add them together

8 0

3 years ago