( ?)(8y^2−4y^4)=40y^4−20y^6 find the missing term

Answer 1

The missing term is -10y^6.

When you multiply the two terms together, you get:

(8y^2) * (-4y^4) = -32y^6

Therefore, the complete expanded form is:

(8y^2−4y^4)=-32y^6 + 40y^4−20y^6 = 40y^4−52y^6.