(-3a-2b)*(-3a+2b)
=(-3a)^2-(2b)^2
=9a^2-4b^2
祝学习进步@
(-3a-2b)*(-3a+2b)
= -(3a+2b)*(2b-3a)
= -(2b+3a)*(2b-3a)
= -(4b²-9a²)
= -4b²+9a²
= 9a²-4b²
(-3a-2b)*(-3a+2b)
=(3a+2b)*(3a-2b)
=9a²-4b²
(-3a-2b)*(-3a+2b)
=(3a+2b)(3a-2b)
=9a²-4b²
(-3a-2b)*(-3a+2b)
=(-3a)²-(2b)²
=9a²-4b²
(-3a-2b)*(-3a+2b)=(3a+2b)(3a-2b)
=(3a)^2-(2b)^2
=9a^2-4b^2
希望帮助到你~