a . 2x³ - x =2(2x²-1)=2(x√2-1)(x√2+1)
b. 2x⁴ - 4x²=2x²(x²-2)=2x²(x-√2)(x+√2)
c. -x⁴+ 2x³ - x²+3x =x(-x³+2x²-x+3)
d. 5x⁴ - 10 x³+ 5 x²=5x²(x²-2x+1)=5x²(x-1)²
a. 3x²y -24xy + 48y =3y(x² -8x + 16) =3y(x-4)²
b. 18ax² + 24ax+ 8a =a(18x²+24x+8)=a(3x√2+2√2)²
c. 49 x² y² + 14y² x + y² =y²(49x²+14x+1)=y²(7x+1)²