(x-6)(x+6)

(3+x)(x-3)

(3b-5)(3b+5)

(5x+8y)(8y-5x)

(m^5-n^3)(m^5+n^3)

(5a^2b-1ab^2)(5a^2b+1ab^2)
4 4
(0.5x^3 + 0.2^4)(0.5x^3-0.2y^4)

(x-6)(x+6)=x²-36(3+x)(x-3)=x²-9(3b-5)(3b+5)=9b²-25(5x+8y)(8y-5x)=64y²-25x²(m^5-n^3)(m^5+n^3)=m^10-n^6(5a^2b-1ab^2)(5a^2b+1ab^2)=25a^4b²-a²b^4(0.5x^3 + 0.2^4)(0.5x^3-0.2y^4)=0.25x^6-0.04x^8