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(3a-2-2ab+5b-2-\(2a^2+ab-4b^2\)) को सरल करने पर क्या मिलेगा?
What is obtained after simplifying (3a-2-2ab+5b-2-\(2a^2+ab-4b^2\))?
Explanation opens after your attempt
Correct Answer
C. \(a^2-3ab+9b^2\)
Step 1
Concept
Signs change in the subtracted bracket. The simplified form is \(3a^2-2ab+5b^2-2a^2-ab+4b^2=a^2-3ab+9b^2\).
Step 2
Why this answer is correct
The correct answer is C. \(a^2-3ab+9b^2\). Signs change in the subtracted bracket. The simplified form is \(3a^2-2ab+5b^2-2a^2-ab+4b^2=a^2-3ab+9b^2\).
Step 3
Exam Tip
घटाने वाले कोष्ठक के चिन्ह बदलते हैं। सरल रूप \(3a^2-2ab+5b^2-2a^2-ab+4b^2=a^2-3ab+9b^2\) है।
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\(7x^2-4x+9\) और \(-3x^2+8x-2\) का योग क्या होगा?
What is the sum of \(7x^2-4x+9\) and \(-3x^2+8x-2\)?
Explanation opens after your attempt
Correct Answer
B. \(4x^2+4x+7\)
Step 1
Concept
Adding like terms gives \(7x^2-3x^2=4x^2\), (-4x+8x=4x), and (9-2=7).
Step 2
Why this answer is correct
The correct answer is B. \(4x^2+4x+7\). Adding like terms gives \(7x^2-3x^2=4x^2\), (-4x+8x=4x), and (9-2=7).
Step 3
Exam Tip
समान पद जोड़ने पर \(7x^2-3x^2=4x^2\), (-4x+8x=4x), और (9-2=7)।
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\(12x^2-5x+4\) में से \(7x^2-9x+10\) घटाने पर क्या मिलेगा?
What is obtained by subtracting \(7x^2-9x+10\) from \(12x^2-5x+4\)?
Explanation opens after your attempt
Correct Answer
A. \(5x^2+4x-6\)
Step 1
Concept
Subtraction gives \(12x^2-5x+4-7x^2+9x-10\). Its simplified form is \(5x^2+4x-6\).
Step 2
Why this answer is correct
The correct answer is A. \(5x^2+4x-6\). Subtraction gives \(12x^2-5x+4-7x^2+9x-10\). Its simplified form is \(5x^2+4x-6\).
Step 3
Exam Tip
घटाने पर \(12x^2-5x+4-7x^2+9x-10\) मिलता है। इसका सरल रूप \(5x^2+4x-6\) है।
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\(7a^2-4ab+6b^2\) में से \(3a^2-9ab+2b^2\) घटाने पर क्या मिलेगा?
What is obtained by subtracting \(3a^2-9ab+2b^2\) from \(7a^2-4ab+6b^2\)?
Explanation opens after your attempt
Correct Answer
A. \(4a^2+5ab+4b^2\)
Step 1
Concept
Subtraction gives \(7a^2-4ab+6b^2-3a^2+9ab-2b^2\). The simplified form is \(4a^2+5ab+4b^2\).
Step 2
Why this answer is correct
The correct answer is A. \(4a^2+5ab+4b^2\). Subtraction gives \(7a^2-4ab+6b^2-3a^2+9ab-2b^2\). The simplified form is \(4a^2+5ab+4b^2\).
Step 3
Exam Tip
घटाने पर \(7a^2-4ab+6b^2-3a^2+9ab-2b^2\) मिलता है। सरल रूप \(4a^2+5ab+4b^2\) है।
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