Question

訪客

幫忙求解一下謝謝

(2,沁 5一8x一zz 能被 5十2 整除,則三? (4分)
解:

Answer 1

Cobe

5x²-8x-a=(5x+2)Q(x)
→x=-2/5代入
→5(-2/5)²-8(-2/5)-a=0

a=5(-2/5)²-8(-2/5)=4