If a=4, then using formula find the value of 27a3-135a2+225a-125
Answers
Answered by
11
Heya!!
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= 27a^3 - 135a^2 +225a-125
= (3a)^3 - 135a^2 +225a - (5)^3
= (3a)^3 - (5)^3 - 3*3a*3a*5 +3*3a*5*5
= (3a)^3 - (5)^3 - 3(3a)(5) (3a-5)
= (3a-5)^3 (by identity)
If a = 4
= {3(4)- 5}^3
= (12-5)^3
= 7^3
= 343
Hope it helps uh :)
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= 27a^3 - 135a^2 +225a-125
= (3a)^3 - 135a^2 +225a - (5)^3
= (3a)^3 - (5)^3 - 3*3a*3a*5 +3*3a*5*5
= (3a)^3 - (5)^3 - 3(3a)(5) (3a-5)
= (3a-5)^3 (by identity)
If a = 4
= {3(4)- 5}^3
= (12-5)^3
= 7^3
= 343
Hope it helps uh :)
ankur115:
thanks you my all doubt is clear now
Answered by
0
Hello Dear!!!
Here's your answer...
The value of a is 4
27a3-135a2+225a-125
substitute..
27(4)³ - 135(4)² + 225(4) -125
27(64) - 135(16) + 900 - 125
1728 - 2160 + 775
373
343 is the answer...
___________________________
HOPE THIS HELPS YOU....
Here's your answer...
The value of a is 4
27a3-135a2+225a-125
substitute..
27(4)³ - 135(4)² + 225(4) -125
27(64) - 135(16) + 900 - 125
1728 - 2160 + 775
373
343 is the answer...
___________________________
HOPE THIS HELPS YOU....
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