यदि (p(x)=7x+a) और (q(x)=9x-a), तो (q(x)-p(x)) क्या है?
If (p(x)=7x+a) and (q(x)=9x-a), what is (q(x)-p(x))?
Explanation opens after your attempt
B. (2x-2a)
Concept
(9x-a-(7x+a)=2x-2a). Change the signs inside the bracket while subtracting.
Why this answer is correct
The correct answer is B. (2x-2a). (9x-a-(7x+a)=2x-2a). Change the signs inside the bracket while subtracting.
Exam Tip
(9x-a-(7x+a)=2x-2a) है। घटाते समय कोष्ठक के चिन्ह बदलें।
Login to save your score, XP, coins and progress.
