Three friends, Nakobe, Mikah, and Ashton, are saving up money to buy microphones for their podcast. The total cost of the microphones is represented by the expression 9x2 − 3x + 4.
The friends have already saved the following amounts:
Nakobe: x2
Mikah: x − 12
Ashton: 3x + 4
Which expression represents the amount of money the friends still need to buy the microphones?
8x2 − 7x − 4
8x2 − 7x + 12
4x2 + 5x + 4
x2 + 4x − 8
