Question

(2a-3 )(2a+3)हाउ टू सॉल्व टू ए माइनस 3 ​

Answer 1

Answer:

4a²-9

Step-by-step explanation:

(a-b)(a+b) =(a²-b²)

a=2a b=3

therefore

(2a-3)(2a+3)={(2a)²-(3)²}

=4a²- 9

Answer 2

Answer:

Step-by-step explanation:

⇒$4a^2-9$ = 0              ∵(a+b)(a-b) = $a^2-b^2$

⇒$4a^2$ = 9

⇒a = $\frac{3}{2}$