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Solve the system of equations algebraically. Show all of your steps.
y=x^2+2x
y=3x+20
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Answered by
Anonymous
y=x^2+2x
y=3x+20
well that means that
x^2+2x = 3x+20
or
x^2 - x - 20 = 0
(x-5)(x+4) = 0
x = 5 or x = -4
if x = 5, y= 3x+20 = 35
if x = -4, y = 3x+20 = 8
y=3x+20
well that means that
x^2+2x = 3x+20
or
x^2 - x - 20 = 0
(x-5)(x+4) = 0
x = 5 or x = -4
if x = 5, y= 3x+20 = 35
if x = -4, y = 3x+20 = 8
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