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Which option is equal to (3(2x+y)-5(x-2y)+2x)?कौन-सा विकल्प (3(2x+y)-5(x-2y)+2x) के बराबर है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 3x+13y3x+13y
Expand the brackets: \(3(2x+y)=6x+3y\) and \(-5(x-2y)=-5x+10y\). Therefore, \(6x+3y-5x+10y+2x=3x+13y\). Hence, option A is correct. In \(13x+13y\), the \(x\)-terms have been added incorrectly. Exam tip: When a bracket has a negative coefficient before it, apply the sign to every term inside the bracket.व्यंजक को खोलें: \(3(2x+y)=6x+3y\) और \(-5(x-2y)=-5x+10y\)। अतः \(6x+3y-5x+10y+2x=3x+13y\)। इसलिए विकल्प A सही है। \(13x+13y\) में \(x\) के पदों का गलत योग किया गया है। परीक्षा टिप: कोष्ठक के पहले ऋण चिह्न या ऋण गुणांक हो तो भीतर के प्रत्येक पद का चिह्न ध्यान से बदलें।
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