Determine el valor de k para que los determinantes sean iguales.
(3x²+2x+1)²=9x⁴-kx³+10x²+4x+1
9x⁴+12x³+10x²+4x+1=9x⁴-kx³+10x²+ 4x+1
12x³=9x⁴-kx³+10x²+ 4x+1-9x⁴-10x²-4x-1
12=-k((x³)/(x³))
12=-k
k=-12
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(3x²+2x+1)²=9x⁴-kx³+10x²+4x+1
9x⁴+12x³+10x²+4x+1=9x⁴-kx³+10x²+ 4x+1
12x³=9x⁴-kx³+10x²+ 4x+1-9x⁴-10x²-4x-1
12=-k((x³)/(x³))
12=-k
k=-12