Simplify (2x + 5)^2 – (2x – 5)^2.

Explanation:

We know that, (a + b)² + (a – b)² = 4ab

Given that,

(2x + 5)² – (2x – 5­)² = 4 × 2x × 5 = 40x

Final Answer:

Hence the simplified form is, (2x + 5)² – (2x – 5­)² = 40x