Answers

2014-09-17T09:51:31+08:00
15^3 - 20x^2 +10x
= -20x^2 + 10x + 3375
=5(-4x^2 + 2x +675) this is the final ans bec. no more whole number factor for this

if finding the x?
solve the equation : (-4x^2 + 2x +675)
by using quadratic formula
the x's will be
xsub1 = -12.74(5)
xsub2= 13.24(5)




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