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What is the simplified form of (5(a-2)-2(a+1))?व्यंजक (5(a-2)-2(a+1)) का सरल रूप क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(3a-12\)\(3a-12\)
On expanding the brackets, \(5(a-2)=5a-10\) and \(-2(a+1)=-2a-2\). Therefore, \(5a-10-2a-2=3a-12\). Hence, the correct answer is \(3a-12\). \(3a-8\) results from handling the signs of the constant terms incorrectly. Exam tip: When a negative coefficient is outside a bracket, multiply it by every term inside the bracket.कोष्ठक खोलने पर \(5(a-2)=5a-10\) और \(-2(a+1)=-2a-2\) मिलता है। अतः \(5a-10-2a-2=3a-12\)। इसलिए सही उत्तर \(3a-12\) है। \(3a-8\) तब मिलता है जब स्थिर पदों के चिह्न गलत लिए जाएँ। परीक्षा टिप: किसी कोष्ठक के बाहर ऋणात्मक गुणांक हो, तो उसे कोष्ठक के प्रत्येक पद से गुणा करें।
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