SOLUTION: why would 4 plus/minus the square root of 32 divided by 2 equal 2 plus or minus the square root of 8 and not be 2 plus or minus the square root of 16 ?

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: why would 4 plus/minus the square root of 32 divided by 2 equal 2 plus or minus the square root of 8 and not be 2 plus or minus the square root of 16 ?       Log On


   



Question 715207: why would 4 plus/minus the square root of 32 divided by 2 equal 2 plus or minus the square root of 8 and not be 2 plus or minus the square root of 16 ?
Found 2 solutions by Alan3354, MathTherapy:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
why would 4 plus/minus the square root of 32 divided by 2 equal 2 plus or minus the square root of 8 and not be 2 plus or minus the square root of 16 ?
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sqrt%2832%29+=+sqrt%2816%2A2%29+=+sqrt%2816%29%2Asqrt%282%29+=+4sqrt%282%29

Answer by MathTherapy(10660) About Me  (Show Source):
You can put this solution on YOUR website!
why would 4 plus/minus the square root of 32 divided by 2 equal 2 plus or minus the square root of 8 and not be 2 plus or minus the square root of 16 ? 


This obviously is the calculation of the roots, using this, the quadratic equation formula.

You gave: %284+%2B-+sqrt%2832%29%29%2F2 = %284+%2B-+sqrt%2816+%2A+2%29%29%2F2 = %284+%2B-+sqrt%2816%29%2Asqrt%282%29%29%2F2 = %284+%2B-+4sqrt%282%29%29%2F2 = %282%282+%2B-+2sqrt%282%29%29%29%2F2 = %28cross%282%29%282+%2B-+2sqrt%282%29%29%29%2Fcross%282%29 = highlight%282+%2B-+2sqrt%282%29%29, or 2+%2B-+sqrt%288%29