1)=100a^4 * 9b^2 -1 =(10a^2*3b-1)(10a^2*3b+1)=(30ab-1)(30ab+1)
2)=(3x-(x-1))(3x+(x-1))=(3x-x+1)(3x+x-1)=(2x+1)(4x-1)
3)=x^3+(y^2)^3=(x+y^2)(x^2-xy^2+y^4)
1)=100a^4 * 9b^2 -1 =(10a^2*3b-1)(10a^2*3b+1)=(30ab-1)(30ab+1)
2)=(3x-(x-1))(3x+(x-1))=(3x-x+1)(3x+x-1)=(2x+1)(4x-1)
3)=x^3+(y^2)^3=(x+y^2)(x^2-xy^2+y^4)