(x - 4)(x + 3) = x^2 + 3x - 4x - 12 = x^2 - x - 12
Answer:
X = 6
Step-by-step explanation:
Since

Answer:
How to calculate the amount of sales tax?
Convert tax percentage into a decimal by moving the decimal point two spaces to the left.
Multiple the pre-tax value by the newly calculated decimal value in order to find the cost of the sales tax.
Add the sales tax value to the pre-tax value to calculate the total cost.
Step-by-step explanation: