Bhaskara II lived in the 12th century.

Bhaskara II's most famous work was the Siddhanta Shiromani, which was a comprehensive treatise on astronomy, mathematics, and astrology.

The Lilavati was a treatise on arithmetic that covered topics such as addition, subtraction, multiplication, division, fractions, and square roots.

The Bijaganita was a treatise on algebra that covered topics such as linear equations, quadratic equations, cubic equations, and indeterminate equations.

The Siddhanta Shiromani was a comprehensive treatise that covered topics from astronomy, mathematics, and astrology.

Bhaskara II's most important contribution to mathematics was the development of the decimal system, which he used in his astronomical calculations.

Bhaskara II's formula for solving quadratic equations is $x = (-b \pm \sqrt{b^2 - 4ac}) / 2a$.

Bhaskara II did not develop a formula for solving cubic equations.

Bhaskara II did not develop a formula for solving indeterminate equations.

Bhaskara II's most important contribution to astronomy was the development of the calendar, which was based on his astronomical observations.

Bhaskara II's most important contribution to astrology was the development of the horoscope, which was based on his astronomical observations.

Bhaskara II was one of the greatest mathematicians of his time, his work had a profound influence on the development of mathematics in India and beyond, and he was a pioneer in the field of astronomy.

Bhaskara II's work has been used in the development of the computer, the invention of the internet, and the development of the space program.

Bhaskara II is considered to be one of the greatest mathematicians of his time because his work had a profound influence on the development of mathematics in India and beyond, he was a pioneer in the field of astronomy, and he was one of the first mathematicians to use the decimal system.