Lucy bought a new car for $25,000. The value of the car depreciated by 12% each year. a) Write an exponential equation to model the value of the car (V) as a function of time (t).
b) How much will the car be worth after 5 years?

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629

the absolute value function