Question

(5-2i)³ in standard form. (class 11th)
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Answer 1

Answer:

65 - 142i

Step-by-step explanation:

APPLY PERFECT CUBE FORMULA: (a - b)³ = a³ - 3$a^{2}$b + 3a$b^{2}$ - b³

a = 5, b = 2i

= 5³ - 3 · $5^{2}$ · 2i + 3 · 5(2i$)^{2}$ - (2i)³

SIMPLIFY:

= 65 - 142i

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HOPE THIS HELPS. \(￣︶￣*\))