(x + 2y + 7z)² Find the square
Answers
Answered by
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
Answered by
4
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
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