Question

-4x^2-12x-9分解因式.急.我要上学了

Answer 1

-4x^2-12x-9分解因式.急.我要上学了

=-(4x^2+12x+9)

=-(2x+3)^2

49a^2-2ab+94b^2

=(23a-32b)^2

4(a-b)+b^2

写错了吧

是不是4(1-b)+b^2?

4(1-b)+b^2

=b^2-4b+4

=(b-2)^2

4xy^2-4x^2y-y^3

=-y(4x^2-4xy+y^2)

=-y(2x-y)^2

(4a^2+1)^2-16a^2

=(4a^2+1+4a)(4a^2+1-4a)

=(2a+1)^2(2a-1)^2