I'm pretty sure you are looking for factored forms as an equivalent equation, so here is how you do it.
This equation would be solved by difference of squares. 16, x^4, and 81 are all perfect squares ( which means that it is a number multiplied by itself, 16 is 4 x4 for example). So the first thing you want to do is recall the formula which is
(a^2 - b^2) = (a - b)*(a + b)
(16x^4 - 81)= 0
Find the sq. root of 16 which is 4, and of x^4 which is x^2, and 81 which is 9. Now re write it in the (a - b)*(a + b) format. ----> (4x^2 - 9)*(4x^2 + 9) = 0
Answer:
7x(3 13)
Step-by-step explanation:
Answer:
Look down
Step-by-step explanation:
1) 40pi meters^2
2) 8100pi yards^2
3) 324 pi meters^2
Answer:
0
Step-by-step explanation:
Anything times 0 is 0.
Answer:
the last one
Step-by-step explanation:
it is the one which is the most fair and would make sense, I don't exactly know how to explain it sorry
