Answer:
4x²+20x+25
Step-by-step explanation:
(2x+5)² = (2x+5)(2x+5)
(2x+5) (2x+5) = 2x(2x) + 2x(5) + 5(2x) + 5(5)
= 4x² + 10x + 10x + 25
= 4x²+20x+25
