A point 'T' is on the same horizontal level as the foot of a tower. if the distance of 'T' from the foot of the tower is 80m and the height of the tower is 60m , find the angle of depression of 'T' from the top of the tower. give your answer to the nearest degree.
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4x^2 + 7x + 3 factorise it using identity that is (a^2 + 2ab + b^2)
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