Five mark exercise problems - II — task. Mathematics State Board, Class 9.

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The length of a rectangle is \((3x + 2)\) units and its breadth is \((3x - 2)\) units. Find its area in terms of \(x\). What will be the area if \(x = 20\) units?

Answer:

The area in terms of \(x =\)

\((9x^2 - 4) \ sq. \ units\)
\((9x^2 + 4) \ sq. \ units\)
\((9x - 4)^2 \ sq. \ units\)
\((9x + 4)^2 \ sq. \ units\)

The area if \(x = 20\) is \(sq. \ units\)

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17. Five mark exercise problems - II

Exercise condition: