Non of the answers are right because the answer should be equivalent to -4
The value of the coefficient B will be 9.
<h3>What will be the value of B in equation written below?</h3>
2(x+By)(x-2y)
=2(x^2 -2xy +Bxy -2By^2)
=2x^2 -4xy + 2Bxy - 4By^2
The original form is 

hence the value of B=9
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