单项式的系数是____________
两个数的差为5,这两个数的积为84.设较小数为x,则可列方程_________,这两个数为___________.
x2-x+_____=(x-______)2.
在横线上填上适当的数或式,使下列等式成立:(1)x2+px+________=(x+_______)2;(2)x2+x+_________=(x+_______)2.
方程(x+1)2=9的解是_________.
填上适当的数,使下列等式成立:(1)x2+2x+________=(x+______)2;(2)x2-6x+________=(x-______)2;(3)t2-10t+________=(t-______)2;(4)y2+_____y+121=(y+_______)2.