Answer:
Step-by-step explanation:
Factor the sum of cubes
a³ + b³ = (a+b)(a² - ab +b²)
= 2a² - 2ab + 2b²
a³ + b³ + 6ab = 2a² + 4ab + 2b²
= 2(a² + 2ab +b²)
= 2(a+b)²
= 8
Answer:
i don't know exactly.
Step-by-step explanation:
but the might be an angle tool online.
A^2+2a=195
Quadratic Formula,
a=13,-15
I guess you're supposed to write the expression on the right in terms of
.
18. Notice that
, so

20. Notice that
, so

3 i think , sorry if u get wrong