During the 600s, negative numbers were in use in India to represent debts. Diophantus’ previous reference was discussed more explicitly by Indian mathematician Brahmagupta, in Brāhmasphuṭasiddhānta in 628, who used negative numbers to produce the general form quadratic formula that remains in use today. However, in the 12th century in India, Bhaskara gives negative roots for quadratic equations but says the negative value “is in this case not to be taken, for it is inadequate; people do not approve of negative roots.” European mathematicians, for the most part, resisted the concept of negative numbers until the 17th century, although Fibonacci allowed negative solutions in financial problems where they could be interpreted as debts and later as losses . At the same time, the Chinese were indicating negative numbers by drawing a diagonal stroke through the right-most non-zero digit of the corresponding positive number’s numeral. The first use of negative numbers in a European work was by Nicolas Chuquet during the 15th century. He used them as exponents, but referred to them as “absurd numbers”.
1. Before you place your order Valentine I just want to touch your butt all the time personalized custom mug
1.1 How much does shipping cost?
Shipping costs will vary depending on the shipping destination and the number of items that you purchase
1.2 How long will it take to ship my order?
Worldwide shipping. Orders typically ship within 5-20 business days. Shipping times vary based on the product and destination.
1.3 I’m having issues placing an order.
2. Payment of Valentine I just want to touch your butt all the time personalized custom mug
2.1 We currently accept the following forms of payment:
Credit Cards: We accept Visa, American Express, Mastercard, and Discover
Debit Cards: We accept debit cards featuring the Mastercard or Visa logo. If you’re paying with a pre-paid debit card, you must register them before using them for online purchases. You can do this by following instructions on the card or contacting their own support teams.
PayPal: PayPal allows members to have a personal account linked to any bank account or credit card for easy payment at checkout.
Sofort: Sofort allows European customers to use their online banking details as a payment method. It is available in the following European countries: Austria, Belgium, Czech Republic, France, Germany, Hungary, Italy, Netherlands, Poland, Slovakia, Spain, Switzerland and UK. This payment method is only available to customers shipping to the eurozone.
GiroPay: GiroPay enables online customers in Germany to pay via direct bank transfer. This payment method is only available to customers shipping to the eurozone.
SEPA: SEPA enables one-click payment via direct debit for consumers in the eurozone. This payment method is only available to customers shipping to the eurozone.