Factor completely. 12x4+18x3+45x2 enter your answer in the box.

what are the roots of the polynomial equation?

x2+6x−72=0

enter your answers in the boxes.

x=
or x=

boris solves the system of equations using the linear combination method.

3x+4y=−87x−3y=6

which steps would allow him to eliminate the y terms in the system of equations?

multiply 3x+4y=−8

by 7. multiply 7x−3y=6 by −3
. add the resulting equations together.
multiply 3x+4y=−8
by 4. multiply 7x−3y=6
by 3. add the resulting equations together.
multiply 3x+4y=−8
by −3 . multiply 7x−3y=6
by 7. add the resulting equations together.
multiply 3x+4y=−8
by 3. multiply 7x−3y=6 by 4. add the resulting equations together.