- A and
- B and
- C and
- D and
Step-by-Step Solution
Area = length × breadth, so factorise. Two numbers with product 10 and sum 7 are 5 and 2, giving . Check the rejected pair — right middle term, wrong constant.
Answer: B) and
The area of a rectangular garden is square metres. Which pair could be its length and breadth?
Class 9PolynomialsPolynomials
Key idea: Finding zeros (roots)
**Linear**: ax + → . One zero.
Example: → .
**Quadratic**: solve by factorisation, or quadratic formula (Class 10).
Example: . Factor: → or . Two zeros.
**General principle**: a polynomial of degree n has AT MOST n real zeros.
Example: → .
**Quadratic**: solve by factorisation, or quadratic formula (Class 10).
Example: . Factor: → or . Two zeros.
**General principle**: a polynomial of degree n has AT MOST n real zeros.
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