यदि (f(x)=x-2-3x) और (g(x)=x-2+3x) हैं तो ((fg)(x)) क्या है?

If (f(x)=x-2-3x) and (g(x)=x-2+3x) then what is ((fg)(x))?

Explanation opens after your attempt
Correct Answer

A. \(x^4-9x^2\)

Step 1

Concept

((fg)(x)=\(x^2-3x\)\(x^2+3x\)=\(x^2\)2-(3x)2=x-4-9x-2). Use the difference of squares formula.

Step 2

Why this answer is correct

The correct answer is A. \(x^4-9x^2\). ((fg)(x)=\(x^2-3x\)\(x^2+3x\)=\(x^2\)2-(3x)2=x-4-9x-2). Use the difference of squares formula.

Step 3

Exam Tip

((fg)(x)=\(x^2-3x\)\(x^2+3x\)=\(x^2\)2-(3x)2=x-4-9x-2)। अंतर वर्ग सूत्र का उपयोग करें।

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Mathematics Answer, Explanation and Revision Hints

यदि (f(x)=x-2-3x) और (g(x)=x-2+3x) हैं तो ((fg)(x)) क्या है? / If (f(x)=x-2-3x) and (g(x)=x-2+3x) then what is ((fg)(x))?

Correct Answer: A. \(x^4-9x^2\). Explanation: ((fg)(x)=\(x^2-3x\)\(x^2+3x\)=\(x^2\)2-(3x)2=x-4-9x-2)। अंतर वर्ग सूत्र का उपयोग करें। / ((fg)(x)=\(x^2-3x\)\(x^2+3x\)=\(x^2\)2-(3x)2=x-4-9x-2). Use the difference of squares formula.

Which concept should I revise for this Mathematics MCQ?

((fg)(x)=\(x^2-3x\)\(x^2+3x\)=\(x^2\)2-(3x)2=x-4-9x-2). Use the difference of squares formula.

What exam hint can help solve this Mathematics question?

((fg)(x)=\(x^2-3x\)\(x^2+3x\)=\(x^2\)2-(3x)2=x-4-9x-2)। अंतर वर्ग सूत्र का उपयोग करें।