09-06-2020
Mathematics

contestada

[tex] {x}^{2} - 4x = 21[/tex]
what are the x intercepts?

Respuesta :

BrainlyHero BrainlyHero

09-06-2020

Answer:

x² - 4x = 21

x² - 4x - 21 = 0

x² - 7x + 3x - 21 = 0

x( x - 7 ) + 3 ( x - 7 ) = 0

( x + 3 ) ( x - 7 ) = 0

x + 3 = 0 and x - 7 = 0

x = -3 and x = 7

Answer Link

Otras preguntas

Denise is comparing a salaried job offer for $1,500 a week to a wage of $55 per hour. Which equation would help her find the "break-even point" where each offer

HELP RN PLEASEEERRRDREDJDBFB

the vertical spread of the data points about the regression line is measured by the y-intercept.

How did the introduction of a standard currency affect the Roman economy?

law requires companies to provide detailed warnings regarding the use of a product. A. Customer privacy B. Product liability C. Potential hazards D. Price discr

The Hertzsprung-Russell diagram shown here suggests that A. Supergiants have a higher luminosity than the Sun.B. White dwarfs have a higher luminosity than the

Find the length of the third side, if necessary, write in simplest radical form.

CORRECT ANSWER WITH **STEPS** GETS BRAINLIEST for the following questions, determine what values of x makes the rational expression equal to zero. 1. x+6 / x-4

the respiratory rate times the tidal volume corrected for dead space is the __

Prompt Rubric | Checklist Write an interpretive essay that analyzes literature from the perspective of a quotation. In your essay, interpret the quotation and e