Question

数学因式类题目.要过程.谢谢.现在有三个多项式:1/2a的平方+a-4,1/2a的平方+5a+4,1/2a的平方-a,请

Answer 1

1/2a²+a-4+1/2a²+5a+4

=a²+6a

=a(a+6)

1/2a²+a-4+1/2a²-a

=a²-4

=(a+2)(a-2)

1/2a²+5a+4+1/2a²-a

=a²+4a+4

=(a-2)²