Question

Write down the square of 2a + 5b.

But please with all calculations and explanations.​

Answer 1

Answer:

We know the identity that

( x +y ) ² = x² + 2xy + y²

Putting x =2a & y = 5b we get

( 2a + 5b ) ² = (2a)² + 2×2a×5b + (5b)²

➙ ( 2a + 5b ) ² = 4a² + 20ab + 25b²

Please Mark it Brainliest

Answer 2

Answer:

The answer is

Thank you