anisa2001
anisa2001 anisa2001
  • 13-04-2015
  • Mathematics
contestada

what are the solution of the equation x^2- 4x -32 = 0 ?show your work and justify each step.

Respuesta :

daniel2019360
daniel2019360 daniel2019360
  • 13-04-2015
x^2-4x-32=0

(x+a)(x+b)

x^2-(a+b)x+ab

a+b=4
ab=-32

a=-b+4
(-b+4)b=-32

-b^2+4b=-32
b^2-4b-32=0
b=8,-4

If b=8, a=-4
If b=-4, a= 8

Plug in a and b to (x+a)(x+b)
x= -4, 8
Answer Link

Otras preguntas

How did the Mongol bow differ from the medieval English longbow?
Which is the closest synonym for the word dramatically? A. slightly B. inconveniently C. recklessly D. tremendously
advertisement writing about mobile phone , I will make you brainly if you answer my question ​
calculate the total area of the bottom sections of the back and the two side walls which should be tiled.Give your answer in squared metres rounded aaccurately
Which expression represents the statement "12 divided by 3, then add 5"? O A. 12 ÷ (3 + 5) O B. 3÷12 + 5 Solve. Enter your answer in the box. 0.5 x 1.24 O C. 12
Angle MNP ~ Angle HJK. Both triangles are isosceles. if m
Prove the following identity:[tex] \frac{1 + \cos( \alpha ) }{ \sin( \alpha ) } + \frac{ \sin( \alpha ) }{1 + \cos( \alpha ) } = 2 \csc( \alpha ) [/tex]​
A philosophical assumption reflects the author's beliefs about human nature and society. Which statement expresses an assumption that Charlotte Brontë may have
how do you solve 10^-3
( his, hers, yours, theirs, mine, or ours )That is his shirt. It is __________ ?​