Question

expand the following : (7 + m )3​

Answer 1

Answer:

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Answer 2

Answer:

Let us simplify the expression, we get

(7 + m)3 = (7)3 + [ 3 × (7)2 × (m)] + [ 3 × (7) × (m)2] + (m)3

By using the formula,

(a + b)3 = a3 + 3a2b + 3ab2 + b3

Here a = 7, b = m

Now, substitute the value we get

= 343 + (3 × 49)m + (3 × 7)m2 + m3

= 343 + 147m + 21m2 + m3

∴ (7 + m)3 = 343 + 147m + 21m2 + m3