A rectangle has a width of 2x - 3 and a length of 3x + 1. a) Write its area as a simplified polynomial. b) Write expressions for the dimensions if the width is doubled and the length is increased by 2. Write the new area as a simplified polynomial.

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Q: 2. Solve the boundary-value problem dr² v(0,t) = y(5,t) = 0, y(x,0) = 0, yx,0) = 5 sin mx.

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