Q.3 (i) Solve the equation Z* +4 = 0 (ii) Use the roots in Q3(i) to factor :* +4 into the products of two quadratics with real coefficients (iii) Use the polar form to write the answer for (5-1) in the Cartesian coordinate form. (iv) Express V-1 in the Cartesian coordinate form and indicate which is the principal root.

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Maximization

Have you ever seen a bridge in the shape of a parabola? Where is its maximum on the bridge? The maximum of that bridge is the highest point on that bridge. The process of finding the maximum of the bridge here is called the maximization.