sadsagdgad sadsagdgad
  • 16-01-2017
  • Mathematics
contestada

what two numbers multiplied together equal -420, but added together equal 1

Respuesta :

col08
col08 col08
  • 16-01-2017
-21 x 20 multiplied together equal -420 but added together equals 1
Answer Link
texaschic101
texaschic101 texaschic101
  • 16-01-2017
 x * y = -420
x + y = 1.....x = 1 - y

y(1 - y) = -420
-y^2 + y = -420
y^2 - y - 420 = 0
(y + 20)(y - 21) = 0

y + 20 = 0       x + y = 1
y = -20            x - 20 = 1
                       x = 21

y - 21 = 0      x + y = 1
y = 21           x + 21 = 1
                     x = -20

ur 2 numbers are 21 and -20

Answer Link

Otras preguntas

what items did phoencian traders ship as exports to other regions
What major events took place in seabiscuit's rise to fame
Scientists can study in the field or in the
what is the difference between this sequence type and the overarching umbrella of linear relationships
What is the adjective that desribes language in this sentence? the main language in china is chinese.
what was France's involvement in the Revolutionary War?A.) Frances didin't want to get involved in a fight between America and Britain.B.) France started their
How are Sandburg's "Grass" and Stevens's "The Anecdote of the Jar" similar?
pleas help 10 points
in order to say that something doesn't happen in Spanish use the word
Find x and y if angle one is 2x+10 and angle two is 4y-30