49 (x - y)whole sqare - 28 (x - y)z+ 4zsqare
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Answer:
Question is 49(x-y)²-28(x-y)z+4z²
Step-by-step explanation:
A. T. Q
49(x-y)²-28(x-y)z+4z² (a-b)²=a²+b²-2ab
49(x²+y²-2xy)-28(xz-yz)+4z²
49x²+49y²-98xy-28xz+28yz+4z²
(7x)²+(7y)²+ (2z)²-2×7×7×xy-2×7×2×xz+2×7×2×yz
(x)²+(y)²+(z)²-2xy-2xz+2yz=(x+y+z)²
===== ( 7x-7y-2z )²
- HOPE YOU UNDERSTAND
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