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
Akimi4 [234]
3 years ago
9

How do you factor this? x^{2} + 5 x- 9 = ?

Mathematics
1 answer:
Oksanka [162]3 years ago
6 0
x^2+5x-9\\\\a=1;\ b=5;\ c=-9\\\Delta=b^2-4ac\\\\\Delta=5^2-4\cdot1\cdot(-9)=25+36=61 > 0\\\\x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\\sqrt\Delta=\sqrt{61}\\\\x_1=\dfrac{-5-\sqrt{61}}{2\cdot1}=\dfrac{-5-\sqrt{61}}{2}\\\\x_2=\dfrac{-5+\sqrt{61}}{2\cdot1}=\dfrac{-5+\sqrt{61}}{2}\\\\x^2+5x-9=\left(x-\dfrac{-5-\sqrt{61}}{2}\right)\left(x-\dfrac{-5+\sqrt{61}}{2}\right)
You might be interested in
How do you Calculate the volume of each cylinder
DiKsa [7]

Volume= π·R²·H

π is Pi, approximately 3.142

R is the radius of the circular end of the cylinder

H is height of the cylinder

8 0
3 years ago
Read 2 more answers
How do I find the value of the missing sides and angles
Zarrin [17]
That is a 30 60 90 triangle. 
Read about those here: http://www.1728.org/trig2.htm



4 0
3 years ago
determine which postulate or theorem can be used to prove that abc is congruent to dcb is it sas, aas, sss, or asa?
Zigmanuir [339]
Is there a pic I can use to help?
4 0
3 years ago
Read 2 more answers
How many diagonals can you draw from the vertex of an octagon
ludmilkaskok [199]
From one vertex of an octagon you can draw 5 diagonals.

There are 8 vertices in an octagon, and we are choosing one as our starting vertex. There are then 7 vertices left to draw a line to, but 2 of the vertices are already connected to our main vertex (because they are connected along the side of the octagon). That leaves 5 vertices to draw a diagonal to from our original vertex.
8 0
3 years ago
El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar todas las cartas. A su compañ
vodka [1.7K]

El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar todas las cartas. A su compañera rosabel, le toma 9 horas en realizar la misma tarea. Si ambas trabajan juntas para hacer todo el trabajo d ela oficina,

a. Cuánto tiempo le tomará a ambas realizar el trabajo?

Answer:

3.6 horas

Step-by-step explanation:

Sea el número total de horas que ambos trabajaron = T

Deje que la cantidad total de letras por las que pasaron = 1

De la pregunta, se nos dice:

Lourdes necesitó 6 horas para revisar las cartas.

Esto significa que, cada 1 hora, Lourdes revisaba 1/6 de las letras

Rosabel tardó 9 horas en leer las letras.

Esto significa que, cada 1 hora, Rosabel revisó 1/9 de las letras

Por lo tanto,

(1/6 × 1) T + (1/9 × 1) T = 1

(1/6 + 1/9) T = 1

(3 + 2/18) T = 1

(18/5) T = 1

5T / 18 = 1

Cruz multiplicar

5T = 18

T = 18/5

T = 3.6 horas

Por lo tanto, les tomó a ambas 3.6 horas hacer el trabajo.

7 0
3 years ago
Other questions:
  • How do you graph 2x-y=3
    9·2 answers
  • The least common denominator of the rational numbers x^2-y^2/(x^2-8x+15) and y^2/15(x^2-6x+9) is
    5·1 answer
  • The sum of the two digits of a number is 16. The number formed by reversing the digits is 18 more than the original number. Dete
    9·1 answer
  • How many people are on earth ?
    9·1 answer
  • Please help, On Saturday morning, Owen earned $21. By the end of the afternoon he had earned a total of $60. Enter an equation,
    11·1 answer
  • Simplify 3^2 x 3^4 x 3^6
    11·2 answers
  • A construction crew is lengthening a road. Let L be the total length of the road (in miles). Let D be the number of days the cre
    11·1 answer
  • Nike shoes were originally $40 and is now marked up by 5% what is the price after the markup
    9·1 answer
  • 1. A decorative rug in an office building has
    7·1 answer
  • Please hurry I’ll mark as brainlist
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!