Question

expand and simplify 9a²-(3a+2) (3a-2)​

Answer 1

Answer:

9a^2

Step-by-step explanation:

9 a square -(3a+2) (3a-2)

9a^2

Answer 2

Answer:

__________________________

$9a {}^{2} -( 3a + 2)(3a - 2) \\ = 9a {}^{2} -( (3a) {}^{2} - 2 {}^{2} ) \\ = 9a {}^{2} - 9a {}^{2} - 4 \\ = 4$

__________________________

formula uses

$\star\red{(a+b)(a-b)=a^2-b^2}$

________________________

i hope it helps for you plz mark brainlist