Irene purchases a refrigerator for 500.00 in lowa where the tax is 6 percent what is the sale tax

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

"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