SOLUTION: A rectangular storage bin is to be made from a rectangular piece of sheet metal
12 cm by 10 cm, by cutting out equal corners of side x and bending up the
sides. Find x if the sto
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Question 331450: A rectangular storage bin is to be made from a rectangular piece of sheet metal
12 cm by 10 cm, by cutting out equal corners of side x and bending up the
sides. Find x if the storage bin is to hold 90cm³(volume).
I got up to here and I am stuck
4x³ - 44x²+ 120x + 90 = 0
However, my question is worth 8marks and I dont think i am allowed to use a graphic calculator to work it out. How do i answer this question properly?
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
4x^3 - 44x^2 + 120x = 90
2x^3 - 22x^2 + 60x - 45 = 0
test for roots using [(factors of -45) / (factors of 2)]
doesn't seem to be an integer value (maybe not rational) , so Guess-Divide-Average might be the way to solution
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