Please help me thank you! 1. (xyz+10)^2?

(a + b)² = a² + 2ab + b²

Hence, (xyz + 10)²
= (xyz)² + 2(xyz)(10) + (10)²
= x²y²z² + 20xyz + 100

(xyz)^2 + 20xyz + 100

(a+b)^2 = a^2 + 2ab + b^2
(xyz+10)^2 = (xyz)^2 + 2(xyz)(10) + 10^2
= x^2y^2z^2 + 20 xyz + 100

(xyz + 10)^2 =
(xyz + 10)(xyz + 10) =
x^2 y^2 z^2 + 20xyz + 100