Find the Value of
( 1 ) 26 × 26 – 25 × 25 = ______
( 2 ) 163 × 163 – 162 × 162 = _____
Answers
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- ( 1 ) 26 × 26 – 25 × 25 = ______
- ( 2 ) 163 × 163 – 162 × 162 = ______
Answered by
3
Given : ( 1 ) 26 × 26 – 25 × 25 = ______
( 2 ) 163 × 163 – 162 × 162 = _____
To Find : Value
Solution:
( 1 ) 26 × 26 – 25 × 25 = ______
= 26² - 25²
a² - b² = (a + b )(a - b)
a = 26
b = 25
= (26 + 25)(26 - 25)
= (51)(1)
= 51
26 × 26 – 25 × 25 = 51
( 2 ) 163 × 163 – 162 × 162 = _____
= 163² - 162²
a² - b² = (a + b )(a - b)
a = 163
b = 162
= (163 + 162)(163 - 162)
= (325)(1)
= 325
163 × 163 – 162 × 162 =325
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