Factorisation of 1st Algebraic identity

What is the factorization of a² + 2ab + b²?

• 2a² + 2b²

• (a + b)²

• a² + b²

• (a - b)²

Factorize the expression x² + 6xy + 9y².

• (x + 2y)²

• (x + 3y)²

• (x + 5y)²

• (x + 4y)²

Factorize the expression 4x² + 12xy + 9y².

• (2x + 3y)²

• (2x + 2y)²

• (2x + 4y)²

• (2x + 5y)²

What is the factorization of c² + 4cd + 4d²?

• (c + 2d)²

• (c + d)²

• (c - d)²

• (c + 4d)²

Factorize the expression p² + 10pq + 25q².

• (p + 5q)²

• (p + 2q)²

• (p + 3q)²

• (p + 4q)²