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October 20, 2014

October 20, 2014

Posted by **KT** on Saturday, November 23, 2013 at 4:56pm.

x^2+y^2=58

y-x=4

- Algerbra -
**Reiny**, Saturday, November 23, 2013 at 5:01pmfrom the 2nd ---> y = x+4

sub into the 1st

x^2 + (x+4)^2 = 58

2x^2 + 8x+16-58 = 0

x^2 + 4x - 21 = 0

(x+7)(x-3) = 0

x = -7 or x = 3

if x = -7, y = -7+4 = -3

if x = 3 , y = 3+4 = 7

x=3, y=7

or

x=-7, y = -3

- Algerbra -
**KT**, Saturday, November 23, 2013 at 5:04pmthank you x)

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