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2 years ago

X2 - 2x + 4 = 0 How many solutions

Mathematics

1 answer:

g100num [7]2 years ago

3 0

Answer:

Step-by-step explanation:

x^2-(2+2)x+4=0

or, x^2-2x-2x+4=0

or, x(x-2)-2(x-2)=0

or, (x-2)(x-2)=0

Now,

Either, x-2=0

Or, x-2=0

You might be interested in

1/4(X-10)=2X+1 <br><br> what is X?

In-s [12.5K]

Answer: $x=-2$

Step-by-step explanation:

$\frac{1}{4}(x-10)=2x+1$

Distribute 1/4

$\frac{1}{4}x-\frac{1}{4}(10)=2x+1$

$\frac{1}{4}x-\frac{5}{2}=2x+1$

add 5/2

$\frac{1}{4}x-\frac{5}{2}+\frac{5}{2}=2x+1+\frac{5}{2}$

$\frac{1}{4}x=2x+\frac{1*2+5}{2}$

$\frac{1}{4}x=2x+\frac{2+5}{2}$

$\frac{1}{4}x=2x+\frac{7}{2}$

Subtract 2x

$\frac{1}{4}x-2x=2x-2x+\frac{7}{2}$

$\frac{1}{4}x-2x=\frac{7}{2}$

$\frac{1-2*4}{4}x=\frac{7}{2}$

$\frac{1-8}{4}x=\frac{7}{2}$

$-\frac{7}{4} x=\frac{7}{2}$

Multiply by the negative reciprocal of -7/4 which is basically inverting the fraction -4/7

$(-\frac{4}{7} )-\frac{7}{4} x=\frac{7}{2}(-\frac{4}{7} )$

$x=-\frac{28}{14}\\ x=-2$

6 0

2 years ago

Question 2 of 10

ratelena [41]

Answer:

Sorry

Step-by-step explanation:

Sorry i need the points.

3 0

3 years ago

Can anyone help me with this plz

inn [45]

Answer:

Step-by-step explanation:

So we know right off the bat the angles ABE and CBD are congruent because of vertical angles.

Now we can look at the sides.

The ratio for 27:18 = 3:2

The ratio for 36:24 = 3:2

They check out.

That means that the answer is B. SAS

5 0

3 years ago

A local high school has 1250 students in grades 9 through 12. Twenty-eight percent of the students in the school are in the nint

dsp73

Answer:175

Step-by-step explanation:

1. Turn 28% into a decima: 0.28

2. Multiply 1250 by 0.28 to get the amount of ninth grade students:350

3. Half the amount of ninth grade students:175

7 0

3 years ago

If x and y vary inversely and x = 5 when y = -3.5, what is the value of x when y = 10?

Solnce55 [7]

Answer:

Step-by-step explanation:

k = xy

Putting values of x and y in the equation

k = (5)(-3.5)

= - 17.5

Finding value of x when y = 10

k = xy

- 17.5 = x10

Bringing like terms on one side

- 17.5 - 10 = x

-27.5 = x

5 0

2 years ago