Question

-1/4ab+1/4b^2+a^2因式分解

Answer 1

-1/4ab+1/4b^2+a^2

=-1/2ab*2+(1/2b)^2+a^2

=(a-1/2b)^2

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

=(a-b-c)(a-b+c)

-s^4+16

=4^2-s^4

=(4-s^2)(4+s^2)

=(2-s)(2+s)(4+s^2)