SOLUTION: hi i would like to know what are all the real zeros of f(x)=x^4-2x^3-23x^2+24x+144? and can u please show me hot to work it out

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Question 248424: hi i would like to know what are all the real zeros of f(x)=x^4-2x^3-23x^2+24x+144? and can u please show me hot to work it out
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
I graphed it. The zeroes are -3, -3, 4, 4
x^4-2x^3-23x^2+24x+144 = (x+3)^2*(x-4)^2

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