Answer:
Step-by-step explanation:
5x^2 +3 = 83 . . . . given
5x^2 = 80 . . . . . . .subtract 3
x^2 = 16 . . . . . . . . .divide by 5
x = ±√16 = ±4 . . . take the square root
The smaller value of x is -4; the larger value, +4.
