Hi,

I have a question in regard to a quadratic formula I'm solving.

4(a+b)±√(16(aČ+2ab+bČ)-48ab) / 24

4(a+b)±4√(aČ-ab+bČ) / 24

I don't understand how +2ab became -ab and why -48ab disappeared.

Anyone able to clarify that for me?

Thanks

David

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- September 19th 2009, 05:54 AMSplintQuadratic formula 4(a+b)±√(16(aČ+2ab+bČ)-48ab) / 24
Hi,

I have a question in regard to a quadratic formula I'm solving.

4(a+b)±√(16(aČ+2ab+bČ)-48ab) / 24

4(a+b)±4√(aČ-ab+bČ) / 24

I don't understand how +2ab became -ab and why -48ab disappeared.

Anyone able to clarify that for me?

Thanks

David - September 19th 2009, 06:03 AMGrandad