Question

expand (m+7)³............​

Answer 1

Answer:

m³+7³+3×m²×7+3×m×7²

hope it will help you

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Answer 2

Answer:

The expansion of $(m+7)^3$ is $m^3+21m^2+147m+343$

Step-by-step explanation:

Given:

$(m+7)^3$

We know that

$(a+b)^3=a^3+3a^2b+3ab^2+b^3$

so we get as

$(m+7)^3=m^3+3*49*m+3*7*m^2+7^3\\\\(m+7)^3=m^3+21m^2+147m+343$