Question

因式分解 x的4次方-6x的3次方+9x的2次方-16还有下面的

Answer 1

x^4-6x^3+9x^2-16=(x²-3x)²-16=(x²-3x+4)(x²-3x-4)=(x²-3x+4)(x+1)(x-4)2x^3-x^2-2x+1=x²(2x-1)-(2x-1)=(2x-1)(x²-1)=(2x-1)(x+1)(x-1)9x^4-25x^2y^2+16y^4=(9x²-16y²...