A) 5x⁴-20x²=5x²(x²-4)=5x²(x²-2²)=5x²(x-2)²
B)3x³-48x=3x(x²-16)=3x(x²-4²)=3x(x-4)²
C)4x la 5-36x³=4x³(x²-9)=4x³(x²-3²)=4x³(x-3)²
D) 98x la 7-72 x la5=2x la 5(49x² -36x³l=2x la 5(7²x²-6²x³)
E)75x la 7-48x la 5=3x la 5(25x²-16)=3x la 5(5²x²-4²)=3x la 5(5x-4)²
F)54 x la 6 -96x⁴ = 6x⁴(9x²-16)=6x⁴(9x²-4²)= 6x⁴(9x-4)²
