Question

1+36a^2b^2-4a^2-9b^2因式分解

Answer 1

1+36a^2b^2-4a^2-9b^2=(1-4a^2)-(9b^2-36a^2b^2)=(1-4a^2)-9b^2(1-4a^2)=

(1-4a^2)(1-9b^2)=(1-2a)(1+2a)(1-3b)(1+3b)