Question

simplify using suitable identity (2x + 5 )square -(2x- 5 )square​

Answer 1

Answer:

${(2x + 5)}^{2} - {(2x - 5)}^{2} \\ = (2x + 5 + 2x - 5)(2x + 5 - 2x + 5) \\ = (4x)(10) \\ = \boxed{40x}$

40x is the right answer.

Formula used :---

${a}^{2} - {b}^{2} = (a + b)(a - b)$