... Quantitative methods for business Chapter 3Review questionsAnswers to these questions, including fully worked solutions to the Keyquestions marked with an asterisk(*), are on pages 63 3 63 6.3.1* ... x,forming the coefficient, and the power reduced from 2 to 1:x2becomes 2x2Ϫ1or simply 2xThis means that for the equation:y ϭ x288 Quantitative methods for business Chapter 382 Quantitative ... solving the resulting equation.90 Quantitative methods for business Chapter 3Example 3 .6 The production cost equation for the car plant in Example 3.4 was:y ϭ x2Ϫ 6x ϩ 11where y is the cost per...