Question

49 (x - y)whole sqare - 28 (x - y)z+ 4zsqare​

Answer 1

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