Question

Which expression is equivalent to 27x3 + 125?

Answer 1

is that times 3

Answer 2

156

Answer 3

\[\large
a^3 + b^3 = (a+b)(a^2-ab+b^2) \\ \large
27x^3 + 125 = (3x)^3 + 5^3 = ?
\]

Answer 4

just the answer?

Answer 5

after the b^2) is there a plus

Answer 6

a^3 + b^3 = (a + b)(a^2 - ab + b^2)
Here, a = 3x, b = 5. Just plug them in above.