Monday

July 28, 2014

July 28, 2014

Posted by **omar** on Monday, February 27, 2012 at 1:57am.

αx^2 + βx + δ = 0

- Algebra -
**L.Bianchessi**, Monday, February 27, 2012 at 2:23amDo you mean ax^2+ bx+c=0 ??

- Algebra -
**Steve**, Monday, February 27, 2012 at 12:59pmI think that's safe. The symbols used don't really matter. It's easier to type Roman letters, so I'll use those

ax^2 + bx + c = 0

a(x^2 + b/a x) = -c

a(x^2 + b/a x + (b/2a)^2) = (b/2a)^2 - c

a(x + (b/2a))^2 = (b^2 - 4ac)/4a

(x + b/2a)^2 = (b^2 - 4ac)/4a^2

x + b/2a = ±√(b^2 - 4ac)/2a

x = [-b ± √(b^2 - 4ac)]/2a

Look familiar?

- Algebra -
**Henry**, Wednesday, February 29, 2012 at 10:21ampost it.

**Related Questions**

Pure Mathematics - 4) The roots of the equation z^2+2z+4=0 are denoted by α...

Trigonometry - The quadratic equation x^2−9x+10=0 has roots tanα and ...

Math - If α and β are two angles in Quadrant II such that tan α...

math - Complex numbers α and β satisfy αα¯=ββ¯=&#...

math - Let α and β be the roots of 3x2+4x+9=0. Then (1+α)(1+β...

Maths - Let α and β be the roots of 3x^2+4x+9=0. Then (1+α)(1+&#...

math - 1. Let α, β be the roots of the equation x2 - px + r = 0 and &#...

math - The roots of the polynomial f(x)=2x3+20x2+201x+2013 are α,β and...

Math - Find the roots of the given equation by completing the square: ax^2+bx+c=...

Pure Mathematics - 1) i) use an algrbraic method to find the square root of 2+i...