Question

using suitable identity expand( 2y+5)²​

Answer 1

Step-by-step explanation:

${(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab \\ so = {(2y + 5)}^{2} \\ = {(2y)}^{2} + {(5)}^{2} + 2 \times 2y \times 5 \\ {4y}^{2} + 25 + 20y$

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