Monday
May 20, 2013

Homework Help: Algebra

Posted by ShelbyA on Saturday, April 28, 2012 at 3:25pm.

Y^2 - 20y + 100 = 64

Looking for exact solutions. I know they are integers, but...is there a decimal solution?

Thanks

• Algebra - Damon, Saturday, April 28, 2012 at 3:38pm

y^2 -20 y + 36 = 0

y = [ 20 +/- sqrt(400-144) ]/2

y = [20 +/- sqrt(256) ]/2

y = [ 20 +/- 16 ]/2

= 10 +/- 8

18 or 2

or
(y-2)(y-18) = 0

• Algebra - ShelbyA, Saturday, April 28, 2012 at 3:40pm

Marry me?

• Algebra - Damon, Saturday, April 28, 2012 at 3:42pm

I doubt if you really want to marry a retired engineering professor who graduated from high school in 1955.

• Algebra - ShelbyA, Saturday, April 28, 2012 at 3:54pm

Yeah, it would be impossible to believe I'm near your age. I graduated in 1960..we never stop learning sir..

Thank you...

• Algebra - Damon, Saturday, April 28, 2012 at 7:22pm

You are welcome :)

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