Question

choose suitable identity to find the value of 105×95​

Answer 1

Required Answer:-

$\sf \color{lime}155 \times 95 \\ = (100 + 5)(100 - 5) \\ = (100) {}^{2} - (5) {}^{2} \\ \tt \color{green}\therefore(a + b)(a - b) = a {}^{2} - b {}^{2} \\ = 1000 0 - 25 \\ \color{darkgreen} = 9975$

Know More:-

• Identity I: (a + b)² = a²+ ²ab + b²
• Identity III: a² – b²= (a + b)(a – b)
• Identity IV: (x + a)(x + b) = x²+ (a + b) x + ab.
• Identity V: (a + b + c)² = a² + b² + c²+ 2ab + 2bc + 2ca.
• Identity VI: (a + b)³ = a³ + b³ + 3ab (a + b)

Answer 2

hii

Step-by-step explanation:

here is u r answer

=105×95

=95×(100+5)

=95×100+95×5

=9500+475

= 9975

hope it helps

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