Question

x+2y +4z
$(x + 2y + 4z)2$
​

Answer 1

Step-by-step explanation:

${(x+2y+4z)}^{2}$

${:}\mapsto$${x}^{2}+{2y}^{2}+{4z}^{2}+2×x×2y+2×2y×4z+2×4z×x$

${:}\mapsto$${x}^{2}+4y{}^{2}+16z{}^{2}+4xy+16yz+8zx$

Extra information:-

Used formula:-

${:}\mapsto$${\boxed{(a+b+c){}^{2}={a}^{2}+{b}^{2}+{c}^{2}+2ab+2bc+2ca}}$