brainz0r brainz0r
  • 23-04-2014
  • Mathematics
contestada

Please solve by factoring 5x^2+7x-66=0...use a comma to seperate answers.

Respuesta :

Lilith
Lilith Lilith
  • 23-04-2014
[tex]5x^2+7x-66=0 \\ \\5x^2+7x -22x+ 22x-66=0 \\ \\ 5x^2-15x+ 22x-66=0 \\ \\5x(x-3)+22(x-3)=0 \\ \\ (x-3)(5x+22)=0\\ \\x-3 = 0 \ \ or \ \ 5x+22 =0 \\ \\ x=3 \ \ or \ \ 5x=-22 \ \ /:5 \\ \\x=3 \ \ or \ \ x=-\frac{22}{5} \\ \\x=3 \ \ or \ \ x=-4\frac{2}{5} [/tex]
Answer Link

Otras preguntas

An airplane flew for 8 hours at an airspeed of x miles per hour (mph), and for 7 more hours at 325 mph. If the average airspeed for the entire flight was 350 mp
What are the solutions to the equation x2 + 6 = 87?   A. –9 and 9
Compare and contrast Germany's actions in the Rhineland, Austria, and Czechoslovakia
what is the answer for r+11+8r=29?
the original price of a watch was $109.it was on sale for 100.28.what was the discount rate
Compare and contrast Germany's actions in the Rhineland, Austria, and Czechoslovakia
what is 2x+8y=12 in slope intercept form as well as x-2y=0 in slope intercept form
A catalyst a. changes ΔG for an equation b. acts by increasing the rate of the forward reaction more than the reverse reaction c. raises the equilibrium const
A regulation tennis court measures 78 feet long by 36 feet wide.Brad is making a scale drawing of the tennis court using a scale of 1 foot = 1/2 inch.How long i
A stuntman jumps from the roof of a building to the safety net below. How far has the stuntman fallen after 1.6 seconds?