Question

Find the square : 3a +7b​

Answer 1

Answer:

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Answer 2

(9a)²+(14b)²+42ab

Step-by-step explanation:

3a+7b is converted to (a+b)²

(3a+7b)²

(3a)²+(7b)²+2(3a).(7b)

(9a)²+(14b)²+2(21ab)

(9a)²+(14b)²+42ab