woops. this one, if I'm seeing it right...
you would have (7-2x^4)(7-2x^4), and then you have to use the "FOIL" method...right?
Multiply
(7-2x^4)^2
Is this right?
36(-2x^4+7)
3 answers
So, would the answer be
-2x^4+7^2
-2x^4+7^2
(7-2x^4)(7-2x^4)
first, multiply the first two: 7x7=49
then, multiply the outside two:7 x -2x^4, which is -14x^4.
then, multiply the inside two, which is also -14x^4
then, multiply the last two:
(-2x^4) x (-2x^4) which is 4x^8.
so, we have: 49 -14x^4 -14x^4 + 4x^8.
simplified to 49 -28x^4 + 4x^8.
first, multiply the first two: 7x7=49
then, multiply the outside two:7 x -2x^4, which is -14x^4.
then, multiply the inside two, which is also -14x^4
then, multiply the last two:
(-2x^4) x (-2x^4) which is 4x^8.
so, we have: 49 -14x^4 -14x^4 + 4x^8.
simplified to 49 -28x^4 + 4x^8.