Ask question

Ask question

All categories

3 years ago

6

What are the solutions of x2 - 4x+5 = 0?

1 answer:

zvonat [6]3 years ago

8 0

Answer:

x=2+i, 2-i

Step-by-step explanation:

Use symbolab, it's literally so easy.

You might be interested in

Solve S=2(lw + lh + wh) for w

vovikov84 [41]

Dividing by 2, we have S/2=lw+lh+wh. After that, we subtract lh from both sides to get S/2-lh=lw+wh. Next, we divide both sides by w to get (S/2)/w=l+h. Next, we divide by S/2 to get 1/w=(l+h)/(S/2). Lastly, we multiply by w and divide by (l+h)/(S/2) to get w=(S/2)/(l+h)

7 0

3 years ago

Read 2 more answers

The length of a rectangle is the width minus 8 units. The area of the rectangle is 9 units. What is the length, in units, of the

frez [133]

Length of rectangle is 1 unit

<u>Solution: </u>

Given that

Length of a rectangle is width minus 8 units.

Area of rectangle = 9 square units

Need to calculate the length of rectangle.

Let us assume width of rectangle = x

As Length is width minus 8,

Length of the rectangle = x – 8

$\text{ Area of rectangle }=\text{ width of rectangle }\times \text{ Length of the rectangle }$

$\text{ Area of rectangle }= x\times (x-8)$

$\text { Area of rectangle }=\left(x^{2}-8 x\right)$

As given that area of rectangle = 9 square units

$\begin{array}{l}{\Rightarrow x^{2}-8 x=9} \\\\ {\Rightarrow x^{2}-8 x-9=0}\end{array}$

On solving above quadratic equation for x, we get

$\begin{array}{l}{\Rightarrow x^{2}-9 x+x-9=0} \\\\ {\Rightarrow x(x-9)+1(x-9)=0} \\\\ {\Rightarrow (x-9)(x+1)=0}\end{array}$

When $x-9 =9, x = 9$

When $x + 1 = 0, x = -1$

As width cannot be negative, so considering x = 9

$\text{ Length of rectangle }= x-8 = 9-8 = 1 \text{ unit }$

Hence, Length of rectangle is 1 unit.

5 0

3 years ago

What is the measure of <7?

mash [69]

Answer:

120

Step-by-step explanation:

<2 = 120 degrees

<3 = <2 vertical angles

Assuming b is parallel to c

<3 = <6 alternate interior angles

<6 = <7 vertical angles

<2 = <7 =120

5 0

3 years ago

You need to earn at least $100. You earn $8.00 per hour mowing lawns. Write and solve an inequality that represents the number o

leonid [27]

Answer:

subject?

Step-by-step explanation:

7 0

3 years ago

6th-grade math, help me please:)

riadik2000 [5.3K]

Answer:

1. is b and 2. is c

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers