Question

(2m -5)3. it is expand questions​

Answer 1

Answer:

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Step-by-step explanation:

(2m-5)3

=>(2m×3)-(5×3)

=>6m-15

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Answer 2

Answer:

Let us simplify the expression, we get

(2m – 5)3 = (2m)3 – [ 3 × (2m)2 × 5 ] + [ 3 × (2m) × (5)2] – (5)3

By using the formula,

(a – b)3 = a3 – 3a2b + 3ab2 – b3

Here, a = 2m, b = -5

Now, substitute the value we get

= 8m3– [3 × 4m2 × 5] + [ 3 × 2m × 25] – 125

= 8m3 – 60m2 + 150m – 125

∴ (2m – 5)3 = 8m3 – 60m2 + 150m – 125