(3r(r+2)-2r(4-r)) को सरल करने पर क्या मिलेगा?
What is obtained after simplifying (3r(r+2)-2r(4-r))?
Explanation opens after your attempt
A. \(5r^2-2r\)
Concept
(3r(r+2)=3r-2+6r) and (-2r(4-r)=-8r+2r-2). The total is \(5r^2-2r\).
Why this answer is correct
The correct answer is A. \(5r^2-2r\). (3r(r+2)=3r-2+6r) and (-2r(4-r)=-8r+2r-2). The total is \(5r^2-2r\).
Exam Tip
(3r(r+2)=3r-2+6r) और (-2r(4-r)=-8r+2r-2) है। कुल \(5r^2-2r\) मिलेगा।
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