Question

3A + 5 b whole square - 4 c square ​

Answer 1

Answer:

( 3a + 5b)² – 4c²

now using ( a + b)² formula=>

= [ ( 3a)² + 2×3a×5b + ( 5b)² ] – 4c²

= 9a² + 30ab + 25b² – 4c²

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