Question

(3a-5)²
factorise
step by step​

Answer 1

Answer:

a = 5/3 , 5/3

Step-by-step explanation:

(3a - 5)²

{Using identity : (a - b)² = a² + b² - 2ab}

(3a)² + (5)² - 2(3a)(5)

9a² + 25 - 30a

9a² - 30a + 25 = 0

9a² - 15a - 15a + 25 = 0

3a(3a - 5) - 5(3a - 5) = 0

(3a - 5)(3a - 5) = 0

3a - 5 = 0                 3a - 5 =0

3a = 5                       3a = 5

$a=\frac{5}{3}$                          $a=\frac{5}{3}$