solving quadratic equations by completing the square
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2 Answers

x^2 -2x -5=0

bekum x-3.449489743)*(x+1.449489743)

quadratik equashun...

-b/2a=1, b^2-4ac=24, sqrt(24)=4.898979486, sqrt/21=2.4494897427831
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x²-2x=5 ⇒ x²-2x+1=5+1 ⇒ x²-2x+1=6 ⇒

(x-1)²=6 ⇒ √(x-1)²=√6 ⇒ x-1=±√6 ⇒ x=1±√6

CK: x²-2x=(1+√6)²-2(1+√6)=(1+2√6+6)-2(1+√6)=5

x²-2x=(1-√6)²-2(1-√6)=(1-2√6+6)-2(1-√6)=5   CKD.

The answers are: x=1+√6, or x=1-√6

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