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The expanded form of (3x−5)3 is
- a)27x3−135x2+225x−125
- b)27x3+135x2−225x−125
- c)27x3+135x2+225x−125
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The expanded form of(3x−5)3 isa)27x3−135x2+225x−125b...
Let a = 3x and b = 5 (3x)³ - (5)³ - 3×3x×5(3x- 5) = 27x³ - 125 -45x ( 3x -5) = 27x³ -125 - 135x² + 225x = 27x³ - 135x² + 225x - 125
Most Upvoted Answer
The expanded form of(3x−5)3 isa)27x3−135x2+225x−125b...
The expanded form of 3x is 3 times x, which is simply 3x. There is no further expansion needed for this expression.
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Community Answer
The expanded form of(3x−5)3 isa)27x3−135x2+225x−125b...
Let a = 3x and b = 5 (3x)³ - (5)³ - 3×3x×5(3x- 5) = 27x³ - 125 -45x ( 3x -5) = 27x³ -125 - 135x² + 225x = 27x³ - 135x² + 225x - 125
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The expanded form of(3x−5)3 isa)27x3−135x2+225x−125b)27x3+135x2−225x−125c)27x3+135x2+225x−125d)none of theseCorrect answer is option 'A'. Can you explain this answer?
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