Question

If 9y2 – a = (3y – 2) (3y+2), find the value of a​

Answer 1

Answer:

a = 4

Step-by-step explanation:

LHS = 9y² - a

RHS = (3y - 2)(3y + 2)

using (a+b)(a-b) = a²-b² identity,

= 9y² - 4

since, LHS = RHS (Given)

9y²- a = 9y²- 4

- a = - 4

a = 4