Evaluate: (2.3)3 − 0.027(2.3)2 + 0.69 + 0.09
मान ज्ञात कीजिए: (2.3)3 − 0.027(2.3)2 + 0.69 + 0.09
Answer और ExplanationAnswer and explanation
Answer: (A) 2
0.027 = (0.3)3, 0.69 = 2.3 × 0.3 और 0.09 = (0.3)2
इसलिए व्यंजक (Expression) x3 − y3x2 + xy + y2 के रूप का है, जहाँ x = 2.3, y = 0.3
चूँकि x3 − y3 = (x − y)(x2 + xy + y2), इसलिए मान x − y होगा
= 2.3 − 0.3 = 2
✓
उत्तर 2 है।
0.027 = (0.3)3, 0.69 = 2.3 × 0.3 and 0.09 = (0.3)2
So the expression is x3 − y3x2 + xy + y2 with x = 2.3, y = 0.3
Since x3 − y3 = (x − y)(x2 + xy + y2), the value is x − y
= 2.3 − 0.3 = 2
✓
The answer is 2.
Source: Selection Post Phase XIV (12th) · 19 Sep 2026 · Shift 2। Solution: Prashant Sir, Vijayastra।Source: Selection Post Phase XIV (12th) · 19 Sep 2026 · Shift 2. Solution by Prashant Sir, from Vijayastra.