Question

anyone please tell me how to solve underroot questions of two digit numbes very easily ( I am a beginner for studying underroot questions)​

Answer 1

Solution:-

Process to solve any under root (√x) questions:-

• At first, break that number through prime factorisation.

Example: $\sqrt{12} = \sqrt{2 \times 2 \times 3}$.

• Second step is grouping. You must always group the same numbers (always in pairs). Give a line under the groups.

Example: $\sqrt{\underline{2 \times 2} \times 3}$.

• Then, you have to take out the pairs. REMEMBER! After the pairs (x²) comes outside the radical sign (√), the power of that number become 1 (x).

Example: $\sqrt{\underline{2 \times 2} \times 3} = 2 \sqrt{3}$.

__________...

You must remember the squares of some numbers. They are also helpful, see below:

• 1² = 1
• 2² = 4
• 3² = 9
• 4² = 16
• 5² = 25
• 6² = 36
• 7² = 49
• 8² = 64
• 9² = 81
• (10)² = 100
• (11)² = 121
• (12)² = 144
• (13)² = 169
• (14)² = 196
• (15)² = 225