Question

(x + 2y + 7z)² Find the square​

Answer 1

Answer:

x²+4y²+47z²+4xy+28yz+14xz

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2ab+2bc+2ca

so acc. to question

(x)²+(2y)²+(7z)²+2(x)(2y)+2(2y)(7z)+2(7z)(x)

x²+4y²+47z²+4xy+28yz+14xz

please mark it brainlist

Answer 2

Answer:

(x + 2y + 7z)² (a + b + c)²

= a² + b² + c² + 2ab + 2bc + 2ca (x + 2y + 7z)²

=(x)² + (2y)² + (7z)² + 2(x)(2y) + 2(2y)(7z) + 2(7z)(x)

= x²+ 4y² + 49z² + 4xy + 28yz + 14zx

hope it helps you