Expand/ विस्तृत करें:(3x – 7)^2 = ?
Expand/ विस्तृत करें: $ (3x – 7)^2 $= ?
Detailed Solution & Logic
Correct Answer:
\(9x^2 - 42x +49\)
Use the identity $(a-b)^2 = a^2 - 2ab + b^2$.
$(3x - 7)^2 = (3x)^2 - 2(3x)(7) + 7^2$
$= 9x^2 - 42x + 49$
Answer: $9x^2 - 42x + 49$
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