Elvanganpeaco
Elvanganpeaco
13-11-2016
Mathematics
contestada
what's the solution for 2x 7y=2 x y=-1
Respuesta :
VBloodlinesBone
VBloodlinesBone
17-11-2016
Simplifying
(2x + -7y ) = 0
Multiply
(2x + -7y) * (x + y)
(2x * (x + y) + -7y * (
x + y)) = 0
((x * 2x + y * 2x) + -7y * (x + y)) = 0
Reorder the terms:
((2xy + 2x2) + -7y * (x + y)) = 0
((2xy + 2x2) + -7y * (x + y)) = 0
(2xy + 2x2 + (x * -7y + y * -7y)) = 0
(2xy + 2x2 + (-7xy + -7y2)) = 0
Reorder the terms:
(2xy + -7xy + 2x2 + -7y2) = 0
Combine like terms: 2xy + -7xy = -5xy
(-5xy + 2x2 + -7y2) = 0
Solving -5xy + 2x2 + -7y2 = 0
Solving for variable 'x'.
Factor a trinomial.
(2x + -7y)(x + y) = 0
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