Explanation Given: The quadratic equation, 7.63 x 2 + 2.79 x = 5.32 Formula used: Consider the quadratic equation, a x 2 + b x + c = 0 The quadratic formula is: x = − b ± b 2 − 4 a c 2 a Calculation: The given equation can be re-written as, 7.63 x 2 + 2.79 x − 5.32 = 0 Compare the given equation with the equation, a x 2 + b x + c = 0 . Here, a = 7.63 , b = 2.79 and c = − 5.32 Now put these values in the quadratic formula: x = − b ± b 2 − 4 a c 2 a That is, x = − 2.79 ± ( − 2.79 ) 2 − 4 × ( 7.63 ) × ( − 5.32 ) 2 × 7.63 = − 2

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ISBN: 8220101336323

Author: MULLINS

Publisher: PEARSON

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Chapter 1.7, Problem 45E

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To Calculate: The approximate solutions of the given quadratic equation with the help of the calculator and quadratic formula.

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Chapter 1.7, Problem 44E

Chapter 1.7, Problem 46E

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