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(3. Expand using \( ( a + b ) ^ { 3 } = a ^ { 3 } + b ^ { 3 } + 3 a b ( a + b ) \) or \( ( a - b ) ^ { 3 } = a ^ { 3 } - b ^ { 3 } - 3 a b ( a - b ) \) (1) \( ( 3 x - 7 y ) \) (li) \( \left( \frac { x } { 4 } + \frac { y } { 3 } \right) \)

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Q1
Verify:
a3+b3=(a+b)3−3ab(a+b) for a=3,b=4.
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Q2
a3 – b3 = (a−b)3 + 3ab(a - b)​
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Q3

Which of the following equation/s is/are correct?

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Q4

Which of the following equations are correct?

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(iii) (a−b)3=a3−b3−3ab(a+b)
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Q5

Which of the following equation/s is/are correct?

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