Question

R为何值时,-3x^2 y^2R与4x^2 Y^6是同类项,并求出-2R+R^2-1的值

Answer 1

∵,-3x^2 y^2R与4x^2 Y^6是同类项,

∴2R=6

R=3

∴-2R+R^2-1

=-2*3+3²-1

=-6+9-1

=2