Question

Answer 1

\(BT1:\\ a,=4x^2+12xy+9y^2\\ b,=25x^2-10xy+y^2\\ c,=3^2-\left(\sqrt{2}\right)^2=7\\ d,=x^4-\dfrac{4}{25}y^2\\ e,=8x^2+12x^2y^2+6xy^4+y^6\\ f,=27x^6-54x^4y+36x^2y^2-8y^3\\ g,=\dfrac{8}{27}x^6-\dfrac{2}{3}x^4y+\dfrac{1}{2}x^2y^2-\dfrac{1}{8}y^3\\ h,=x^3-64\\ k,=x^3-27y^3\\ l,=x^6-\dfrac{1}{27}\)

Answer 2

\(BT2:\\ a,A=8x^3+60x^2+150x+125-60x^2-150x-8x^3=125\\ b,B=9x^2+6x+1+12x-9x^2-30x-25+12x+6=18\)