Question

Evaluate the following by sutable identities (5a+2b+4c) square

Answer 1

Answer:

Hey mate! Here's your answer:

25a² + 4b² + 16c² + 20ab + 16bc + 40ac.

Step-by-step explanation:

(5a + 2b + 4c)²

By using (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ac where a = 5a, b = 2b and c = 4c,

(5a)² + (2b)² + (4c)² + 2(5a)(2b) + 2(2b)(4c) + 2(5a)(4c)

25a² + 4b² + 16c² + 20ab + 16bc + 40ac.

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Answer 2

Answer:

25a2 + 4b2 + 16c2 + 20ab + 16bc + 40ac

Step-by-step explanation:

The identity used here is (a + b + c) whole square

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