71) x^4 + 2x^3 - 3x^2 - 4x + 4 = 0
the rational zeros of the function are
+- { 1 , 2 , 4 }
= +- 1 , +- 2 , +- 4
checking the roots by plugging it in the equation
we get actual root at
x = 1 , x = -2
real roots are
x = 1 ( multiplicity 2 )
x = -2 ( multiplicity 2 )
71 60. 321z+ 61.-2x3 + 5x2-3x+9=0 62. _x3 + 8x-12-0 Use the rational zero theorem, Descartes's...