All categories

2 years ago

Solve 5x^2-4x-2=0 by completing the square

Mathematics

1 answer:

konstantin123 [22]2 years ago

5 0

Answer:

Hello

Here's the answer:

2x^2 + 5x + 2 = 0\\
2x^2+4x+x+2=0\\
2x(x+2)+1(x+2)=0\\
(2x+1)(x+2)=0\\
x=-\frac{1}{2} \vee x=-2

x^2-4x+1=0\\
x^2-4x+4-3=0\\
(x-2)^2=3\\
x-2 =\sqrt3 \vee x-2=-\sqrt3\\
x=2+\sqrt3 \vee x=2-\sqrt3

Step-by-step explanation:

You might be interested in

Walter from a leaking faucet is dripping into a cylindrical cup. The weight of water in inches, why, after x hours is graphed be

Anastasy [175]

Answer:

CStep-by-step explanation:

7 0

2 years ago

In a lab experiment, 2400 bacteria are placed in a petri dish. Due to the conditions, the

o-na [289]

Answer:

38,400 bacteria

Step-by-step explanation:

Because there are 24 hours in a day, it will double 4 times

2400times 2 equals 4800 (1st)

4800 times 2 equals 9600 (2nd)

9600 times 2 equals 19200 (3rd)

19200 times 2 equals 38400 (4th)

5 0

3 years ago

I’d like to know how to solve this problem.

sergiy2304 [10]

Can you show the problem? Those are the questions but I need the actual graph.

6 0

3 years ago

A woman walks due east on the deck of a ship at 4 mi/h. the ship is moving south at a speed of 24 mi/h. find the speed of the wo

grandymaker [24]

we are given

A woman walks due east on the deck of a ship at 4 mi/h.

the ship is moving south at a speed of 24 mi/h

so, firstly, we will draw diagram

so, we have

$OW=4$

$OS=24$

now, we can use Pythagoras theorem

$SW^2=OS^2+OW^2$

now, we can plug values

and we get

$SW^2=24^2+4^2$

$SW=24.33$

so,

the speed of the woman relative to the surface of the water is 24.33 mi/h .......Answer

6 0

3 years ago

Draw place value disks on the place value chart 0.7 ÷ 4

Mama L [17]

Change 0.7 to 7/10 and 4 to 1/4,so it'll be 7/10x1/4, then find least common denominator, 40.change fractions to 28/40x10/40=280/40=70

4 0

3 years ago