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RATIONAL NUMBERS | SPEED NOTES | MATHEMATICS | CBSE | CLASS 7

Chapter – 9

Rational Numbers

Rational Number: A number that can be expressed in the form

14. Every positive rational number is greater than zero.

15. Every negative rational number is less than zero.

16. The rational numbers can be represented on the number line.

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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