कौन-सा द्विघात व्यंजक ((x-4)(x+2)) से प्राप्त होता है?
Which quadratic expression is obtained from ((x-4)(x+2))?
Explanation opens after your attempt
A. \(x^2-2x-8\)correct expansion
Concept
The cross terms (2x) and (-4x) combine to (-2x). In exams add outer and inner terms.
Why this answer is correct
The correct answer is A. \(x^2-2x-8\) / correct expansion. The cross terms (2x) and (-4x) combine to (-2x). In exams add outer and inner terms.
Exam Tip
क्रॉस पद (2x) और (-4x) मिलकर (-2x) देते हैं। परीक्षा में बाहरी और अंदरूनी पद जोड़ें।
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