Question

expand the following using identities (2x+ 7y )2​

Answer 1

Answer:

2x^2+14y

Step-by-step explanation:

Answer 2

Answer:

(2x + 7y)^2

• identity = (a + b)^2 = a^2 + b^2 + 2ab
• a = 2x b = 7y
• (2x)^2 + (7y)^2 + 2 × 2x × 7y
• 4x + 14y + 28xy

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