MTH 108 Chapter Notes - Chapter 10-11: Precalculus, Algebraic Expression, Binomial Theorem

• School: University of Miami
• Department: Mathematics
• Course: MTH 108
• Professor: Lun- Yi Tsai

Document Summary

Precalculus mathematics ii - professor lun-yi tsai"s class. 10. 1 systems of equations in two variables notes: sterling. Solve one of the two equations for either of the two variables in terms of the other variable. Substitution example x y = 9 x + y = 3. 9 + 2y 9 = 3 9. 2x + 5y = 18 x + 2y = 9 x + 2y 2y = 9 2y x = 9 2y. 18 + y 18 = 18 18 y = 36 x = 9 2y x = 9 2( 36) x = 9 + 72 x = 81 x + 2y = 9. 2x + 5y = 18 (81) + 2( 36) = 9 2(81) + 5( 36) = 18. Multiply all of the terms of either one or both of the equations by the chosen constants from obtain either of the coe cients for either x or y.