A) =(10a^2)^2-(b/coren3)^2=(10a-b/coren3)(10a+b/coren3) б)=3x^2)^2-(x-1)^2=(3x-x+1)(3x+x-1)=(2x+1)(4x-1) b)=x^3+(y^2)^3=(x+y^2)(x^2-xy^2+y^4) 2^2=4; 4^4=4*4*4*4=16*16=256