(2a-11)(11+2a)-(2a-5)^2=0

Question

(2a-11)(11+2a)-(2a-5)^2=0

Answer 1

(2a-11)(11+2a)-(2a-5)² = 0

4а² - 121 - 4а² + 20а - 25 =0

20а - 146 = 0

20а = 146

а = 146/20

а = 7,3