3(5х-3)(4х^2-1)=8(4х^2-1)^2
3(5x-3)(4x²-1)=8(4x²-1)² 3(5x-3)(4x²-1)-8(4x²-1)²=0 (4x²-1)(3(5x-3)-8(4x²-1))=0 (4x²-1)(15x-9-32x²+8)=0 (4x²-1)(-32x²+15x-1)=0 4x²-1=0 или -32x²+15x-1=0 4x²=1 D=225-128=97 x²=1/4 x₁=(15-√97)/(-64) x₂=(15+√97)/(-64) x₁=-1/2 x₂=1/2