(5a^2+2a-1)-4(3-8a+a^2)

问题描述:

(5a^2+2a-1)-4(3-8a+a^2)
化简

(5a^2+2a-1)-4(3-8a+a^2)
=5a^2+2a-1-12+32a-4a^2
=5a^2-4a^2+32a+2a-1-12
=a^2+34a-13