6z^2-3z=-220 complete the square

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Which expression is equivalent to 3^3 + 2^2?