Show that the area of a parallelogram whose sides are
a and is | axb |= ?
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Area =∣a×b∣=15 (given) ...(i)
If the sides are (3a+2b) and (a+3b)
Area of parallelogram =∣(3a+2b)×(a+3b)∣
=∣7(a×b)∣
=7∣a×b∣
=7×15 ....[from equation (i)]
=105 sq units
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