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April 19, 2014

April 19, 2014

Posted by **becca** on Tuesday, January 17, 2012 at 11:03pm.

x^2 + 2x - 8

- Quadraitic equations -
**drwls**, Tuesday, January 17, 2012 at 11:29pmStart by factoring

(x+4)(x-2) = 0

The equation is true if either factor is zero.

x = +__ or -___

- Quadraitic equations -
**becca**, Tuesday, January 17, 2012 at 11:31pmCan you show me the steps please???? to solve this equation.

- Quadratic equations -
**drwls**, Tuesday, January 17, 2012 at 11:44pmI just did. The final answer is 2 or -4. Do you understand how to factor equations? That might be a topic worth reviewing.

If you wan to do it the hard way, you can also use the quadratic equation

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

Then substitute a = 1, b = 2 and c = -8

sqrt(b^2 -4ac) = sqrt36 = 6

x = (1/2)*[-2 +/-6]

= (1/2)(4 or -8)

= 2 or -4

- Quadraitic equations -
**becca**, Tuesday, January 17, 2012 at 11:51pmThank you so much and I definetly need to review how to factor equations<<<good night and sweet dreams>>>thank you for helping me

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