Expand and combine like terms (9c^2+c^6)(9c^2-c^6)

−c12+81c4

Step-by-step explanation:

(9c2+c6)(9c2−c6)

=(9c2+c6)(9c2+−c6)

=(9c2)(9c2)+(9c2)(−c6)+(c6)(9c2)+(c6)(−c6)

=81c4−9c8+9c8−c12

=−c12+81c4

a framing bias

step-by-step explanation:

rodrigo is subject to a framing bias i believe.