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(4x+y-3z)² is in the form of (a+b+c)²
∵(a+b+c)²=a²+b²+c²+2ab+2bc+2ca,
(4x+y-3z)²=(4x)²+(y)²+(-3z)²+2(4x)(y)+2(y)(-3z)+2(-3z)(4x)
=16x²+y²+9z²+8xy-6yz-24zx.
∵(a+b+c)²=a²+b²+c²+2ab+2bc+2ca,
(4x+y-3z)²=(4x)²+(y)²+(-3z)²+2(4x)(y)+2(y)(-3z)+2(-3z)(4x)
=16x²+y²+9z²+8xy-6yz-24zx.
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(4x+y-3z)²
[ (a+b+c)² = a²+b²+c²+2ab+2bc+2ac]
= (4x)²+(y)²+(-3z)²+2(4x)(y)+2(y)(-3z)+2(-3z)(4x)
= 16x² + y² + 3z² +8xy -6yz -24xz
[ (a+b+c)² = a²+b²+c²+2ab+2bc+2ac]
= (4x)²+(y)²+(-3z)²+2(4x)(y)+2(y)(-3z)+2(-3z)(4x)
= 16x² + y² + 3z² +8xy -6yz -24xz
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