1)X2-16X+60=x²-16x+64-4=(x-8)²-2²=(x-8-2)(x-8+2)=(x-10)(x-6)
2)X2-4X-77=x²-4x+4-81=(x-2)²-9²=(x-2-9)(x-2+9)=(x-11)(x+7)
3)3X2+4X-7=3x²-3x+7x-7=3x(x-1)+7(x-1)=(x-1)(3x+7)
4)X2+20X-96=x²+20x+100-196=(x-10)²-14²=(x-10-14)(x-10+14)=(x-24)(x+4)
5)X2-4X-96=x²-4x+4-100=(x-2)²-10²=(x-2-10)(x-2+10)=(x-12)(x+8)
6)X2+10X-24=x²+10x+25-49=(x+5)²-7²=(x+5-7)(x+5+7)=(x-2)(x+12)