因式分解:(7a^2+2b^2)-(2a^2+7b^2)^2=?a^3x^3+8a^2x^4+16ax^5=?(7a^2+2b^2)-(2a^2+7b^2)^2=?a^3x^3+8a^2x^4+16ax^5=?(a^2+b^2-1)^2-4a^2b^2=?

问题描述:

因式分解:(7a^2+2b^2)-(2a^2+7b^2)^2=?a^3x^3+8a^2x^4+16ax^5=?
(7a^2+2b^2)-(2a^2+7b^2)^2=?
a^3x^3+8a^2x^4+16ax^5=?
(a^2+b^2-1)^2-4a^2b^2=?

a^3x^3+8a^2x^4+16ax^5=ax^3(a^2+8ax+16x^2)=ax^3(a+4x)^2