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NCERT SOLUTIONS | SCIENCE | CBSE | CLASS 9 |

MATTER IN OUR SURROUNDINGS

IS MATTER AROUND US PURE?

ATOMS AND MOLECULES

STRUCTURE OF THE ATOM

THE FUNDAMENTAL UNIT OF LIFE

TISSUES

DIVERSITY IN LIVING ORGANISMS

MOTION

FORCE AND LAWS OF MOTION

GRAVITATION

WORK AND ENERGY

SOUND

WHY DO WE FALL ILL?

NATURAL RESOURCES

IMPROVEMENT IN FOOD RESOURCES

When $a \ne 0$, there are two solutions to $ax^2 + bx + c = 0$ and they are $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$ <math...

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