MATH 115 Lecture Notes - Lecture 5: Discriminant

• School: Towson University
• Department: Mathematics
• Course: MATH 115
• Professor: johnson

Document Summary

Least common denominator gets rid of the fraction x 3. Lcd = 2 2 7 = 28 . 7 ( x 3)=10 4 ( x+5 ) 11 x =11 x=1 x. Lcd=10 5 x=20+2 x 50 3 x= 30 x= 10. Zero product property ( x+5 )( x 2)=0 x= 5, 2. 2 x 2+ x 1=0 ( 2 x 1)( x +1)=0 x= 1. , where ax2 + bx +c = 0: 9x2 -6x 4 = 0 where a=9 b=-6 c=-4 x=