Sunday

April 20, 2014

April 20, 2014

Posted by **esmith** on Saturday, July 27, 2013 at 11:16pm.

- Math -
**Chol**, Sunday, July 28, 2013 at 1:56ama= x

b = x+7

c = 13

x^2 + (x+7)^2 = 13^2

= x^2 + x^2 +7x +7x + 49 = 169

= 2x^2 + 14x + 49 = 169

= 2x^2 + 14x + 49 -169= 169-169

= 2x^2 + 14x -120 = 0

= x^2 +7x -60 = 0

(x -5)(x+12)= 0

x = 5

x = -12 ignored when it is negative

a= 5

b = 12

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