Tuesday

October 21, 2014

October 21, 2014

Posted by **Corinna** on Saturday, October 10, 2009 at 10:46am.

- Algebra -
**drwls**, Saturday, October 10, 2009 at 12:00pmB^2 - 4AC = 12

x = [10 +/- sqrt12]/2

= 5 +/- (2*sqrt3)/2

= 5 +/- sqrt3 = 6.732 or 3.268

That is all the simplification you can to.

- Algebra -
**jim**, Saturday, October 10, 2009 at 12:06pmWell done! You got it right. But I think you may have missed a turn in the simplification.

The simplification is largely a matter of taste, but also laziness - the less you have to write to use your result in the next stage of a problem, the better :-)

You started with:

(10 +/- sqrt(12))/2

sqrt(12) = sqrt(4)*sqrt(3) = 2sqrt(3)

so (10 +/- sqrt(12))/2 =

(10 +/- 2sqrt(3)) /2

= 10/2 +/- 2sqrt(3)/2

= 5 +/- sqrt(3)

**Answer this Question**

**Related Questions**

algebra - I worked the problem out, but could you check my work over and see if ...

i need help..algebra/math - solve by using the quadratic formula: x2 plus x ...

Pre-algebra - Solve. 29x – 2(9x – 0.455) = 10x + 0.525 Give us you thinking on ...

Algebra - Quadratic Formula Using +/- for plus or minus Using \/ radical sign...

Math - Solve the following quadratic equation(as exact values) using the ...

Math - How do you graph the quadratic formula x^2-10x=11? Here's what I got so ...

Algebra - I got a couple I want to check my work : Both are Solve using the ...

Algebra - 1)Find the exact solutions to 3x^2=5x-1 using the quadratic formula. ...

8th Grade Algebra - You know how to solve quadratic equations using algebra, ...

Math - Can you check my work Please? Let N(t) be the number of bacteria after t ...