Question

Resolva (3a+2) .(3a-2) + (a+2)²=

Answer 1

(3a + 2) . (3a - 2) + (a + 2)^2

9a^2 - 6a + 6a - 4 + (a)^2 + 2 (a)(2) + (2)^2

9a^2 -4 +a^2 + 4a + 4

9a^2 + a^2 + 4a + 4 - 4

10a^2 + 4 a

2a ( 5a + 2 ) = 0

2a1 = 0 => a1 = 0/2 => a1 = 0

5a2 + 2 = 0 => a2 = - 2/5