1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marrrta [24]
2 years ago
5

X^2+18=0 solve please

Mathematics
1 answer:
diamong [38]2 years ago
3 0

9514 1404 393

Answer:

  x = ±3√2i

Step-by-step explanation:

Add -18 to both sides of the equation:

  x^2 = -18

Take the square root of both sides:

  x = ±√(-18)

Remember that 18=9·2 = (3^2)·2 and √-1 = i. Simplify.

  x = ±(√(3^2))·(√2)·(√-1)

  x = ±3√2i

You might be interested in
Answer?I need it pleaseeee
Elan Coil [88]

Answer: 20 dallors

Step-by-step explanation:

8 0
2 years ago
Collin is building a deck on the back of his house. He has enough lumber for the deck to be 144 square feet. The length should b
joja [24]
Width = x
length = x+10

Area of deck = 144 square feet

Area = length * width

144 = x(x+10)

Solving for x in a quadratic:

x²+10x = 144
x²+10x-144 = 0

Factor:
(x+18)(x-8) = 0

Solving for x:
x = 8, x = -18

Dimensions cannot be negative, therefore x = 8, only.

Length = x + 10
Length = 18

Width = 8
4 0
3 years ago
A condominium building has 25 condo units. Each unit has 5 windows. Ryder said that there are 125 windows altogether.
crimeas [40]
The answer is B, 30 x 5 The answer is reasonable. Ryder is correct. It reasonable because if 25 x 5 is 125, then 30 x 5 won't be too much to be unreasonable. 30 x 5 is 150, therefore it is only 25 windows higher, so it is reasonable. Hope this helps! :)
3 0
2 years ago
80 is 16 1/2 % of what number round to the nearest hundredth
Alex Ar [27]

Answer:

484.84

Step-by-step explanation:

(80/16.5)x100=484.84

4 0
3 years ago
Describe a situation that can be modeled by the integer -10.
alukav5142 [94]

Answer:

To start a cupcake stand you need ten dollars from your parents, who tell you that you must pay it back. You open up your stand with 10 dollars of debt.

6 0
3 years ago
Other questions:
  • What is the sum of the counting numbers 1 - 40
    11·2 answers
  • Identify the common external tangent
    12·2 answers
  • For every 3 girls in Mr Hegarty's class there are 2 boys. What is the ratio of girls to boys in the class? Give your answer in i
    9·2 answers
  • Find the slopes of the asymptotes of the hyperbola with the following equation.
    7·1 answer
  • Translate the algebraic expression
    5·1 answer
  • Two distinct number cubes, one red and one blue, are rolled together. Each number cube has sides numbered 1 through 6. What is t
    6·1 answer
  • Prove algebraiclly that the straight line with equation x = 2y + 5
    10·1 answer
  • Someone please explain (:
    13·2 answers
  • Given that tan2theta=3/8,what is the value of sec theta
    10·1 answer
  • Find two positive numbers whose difference is 13 and whose product is 230
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!