Posted by traci on Wednesday, June 29, 2011 at 7:47pm.
Andrew factored the expression 20x^312x^2+8x as 4x (5x^212x^2+8x). But when Melissa applied the distributive law and multiplied out 4x (5x^212x^2+8x), she got 20x^348x^3+32x^2; thus, Andrew’s solution does not appear to check. Why is that? Please help Andrew to understand this better. Explain your reasoning and correctly factor the original expression, if possible. If the expression is prime, so state.

Algebra  Damon, Wednesday, June 29, 2011 at 8:36pm
sure, you can take 4x out but do it properly
4x (5 x^2 3 x + 2)

Algebra  Tammy, Friday, July 1, 2011 at 10:35pm
Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.
x2 = 3x – 6
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