expand (5x+2y-3z)^2
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Answered by
10
Answer:
We know that (a+b+c) ² = a²+b²+c²+2( ab + bc+ ca)
Given here a=5x b= 2y c=-3z
substitute a,b,c in 1 st equation
(5x+2y-3z)² = 25x² + 4y² + 9z² + 20xy - 12yz - 30 xz
HOPE IT IS HELPFUL
Answered by
17
Answer:
25x² + 4y² + 9z² + 12xy - 20yz - 30zx
Step-by-step explanation:
by identity (a+b+c)²=a²+b²+c²+2ab+2bc+2ca
(5x+2y-3z)²
= (5x+2y+(-3z))²
= (5x)² + (2y)² + (-3z)² + 2(5x)(2y) + 2(2y)(-3z) + 2(-3z)(5x)
= 25x² + 4y² + 9z² + 12xy - 20yz - 30zx
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