The correct simplification of the expression ( 5xy⁷)².(2y²)³ is 25x²y²⁰. Hence, the correct option is B.
Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication and division.
The expression is simplified as:-
( 5xy⁷)².(2y²)³ = ( 25x²y¹⁴) .(y)⁶
The powers are added when their bases are the same.
( 5xy⁷)².(2y²)³ = 25x²y²⁰
Hence, the solution of the expression is 25x²y²⁰
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