Question

$(2x + 7y) {?}^{2}$

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Answer 1

Answer:

4x² + 49y² + 28xy

Step-by-step explanation:

(a + b)² = a² + b² +2ab

(2x + 7y)² = (2x)² + (7y)² + 2(2x)(7y)

               = 4x² + 49y² + 28xy

hope this helps you dear..