Evaluate 30²+20³-50³
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Posted by Akash S 4 years, 3 months ago
- 3 answers
Yogita Ingle 4 years, 3 months ago
30² + 20³ - 50³
= 900 + 8000 - 125000
= 8900 - 125000
= -116100
Gaurav Seth 4 years, 3 months ago
Different method to evaluate
1. 30³ + 20³ - 50³
= 27000 + 8000 - 125000
= 35000 - 125000
= -90000
OR
2. 30³ + 20³ - 50³
= (3*10)³ + (2*10)³ - (5*10)³
= 27*10³ + 8*10³ - 125*10³
= 10³(27 + 8 - 125)
= 1000(-90)
= -90000
OR
3. 30³ + 20³ - 50³
a³ + b³ = (a +b)³ - 3ab(a+b)
a = 30
b = 20
= (30 + 20)³ - 3(30)(20)(30 + 20) - 50³
= 50³ - 1800(50) - 50³
= -90000
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Dhanyatha S Maddodi 4 years, 3 months ago
0Thank You