1.

Solve: (15)2 = __________1. 242. 2153. 2254. 205

Answer» Correct Answer - Option 3 : 225

Given:

Number is (15)2

Identity used:

(a + b)2 = a2 + b2 + 2ab

Calculation:

(15)2 = (10 + 5)2

⇒ (10) + 52 + 2 × 10 × 5 = 100 + 25 + 100

∴ 225

Or we can simply calculate the vaue of 15 × 15 i.e.225



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