Question

expand the following a.(4x+2y+5z)^2

Answer 1

${(4x + 2y + 5z)}^{2} \\ {(4x) }^{2} + {(2 y)}^{2} + {(5z)}^{2} \\ 16 {x}^{2} + 4 {y}^{2} + 25 {z}^{2} + 2(8xy + 10yz + 20zx)$