Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.11 - Solving Equations and Inequalities Graphically - 1.11 Exercises - Page 121: 12

Answer

No solution.

Work Step by Step

Given equation is- $x^{2}+3$ = $2x$ i.e. $x^{2}-2x+3$ = $0$ Algebraic Solution: $x^{2}-2x+3$ = $0$ Finding discriminant- D= $b^{2} - 4ac$ = $(-2)^{2} - 4.(1).(3)$ = $4-12$ = $-8$ As discriminant is negative, there is no real solution of the equation. i.e. Equation has no solution Graphical Solution: $x^{2}-2x+3$ = $0$ Now graphing $y$ = $x^{2}-2x+3$ We get no $x-intercept$ i.e. Equation has no real solution.
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