Find the cube
(i) 3x + 4
Answers
Answered by
3
It's the same as saying (3x + 4) * (3x + 4) * (3x + 4)
First multiply the first two.
(9x^2(this means to the second) + 12x + 12x + 16) * (3x + 4)
Simplify:
(9x^2 + 24x + 16) * (3x + 4)
Now multiply the rest out:
27x^3 + 72x^2 + 48x + 36x^2 + 96x + 64
And simplify:
27x^3 + 108x^2 + 144x + 64
Phew! There's your answer. Enjoy!!
Similar questions