Question

please solve this sum step by step please (3 х - 6+у)^2​

Answer 1

Identity: (a+b+c)^2=a^2+b^2+c^2+2ab+2ac+2bc

= (3x)^2+(-6)^2+(y)^2+2(3x)(-6)+2(3x)(y)+2(-6)(y)

= (3x×3x)+(-6×-6)+y^2+2×3x×-6+2×3x×y+2×(-6)×y

Answer is

$9x {}^{2} + 36 + y {}^{2} - 36 + 6xy - 12y$