Consider two binomials as x−2y and 2x−y
Now,to get the product of two binomials x−2y and 2x−y we use the
distributive law i.e. (x−2y)×( 2x−y) = x(2x)-x(y)-2y(2x)-2y(-y) = 2x2-xy-4xy + 4y2
Therefore ,the product of x−2y and 2x−y is 2x2 + 4y2-5xy.
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