Question

Simplify-. (2a+3)² - (2a-3)². *
2 points

Answer 1

Step-by-step explanation:

use the identity

a^2-b^2= (a+b) (a-b)

(2a+3)(2a-3)

4a^2-9

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Answer 2

$(2a+3)^2−(2a−3)^2$

$=4a^2+12a+9+−4a^2+12a+−9$

$=4a^2+12a+9+−4a^2+12a+−9$

$=(4a^2+−4a^2)+(12a+12a)+(9+−9)$

=24a