Solve the equation by factoring #18

Algebra
Tutor: None Selected Time limit: 1 Day

Solve the equation by factoring.


 2x2 - 15x = 8


Mar 3rd, 2015

2x^2-15x-8=0

set 2x^2-15x-8=(2x+a)(x+b)=0

you can have 2x^2+2bx+ax+ab=0

set 2b+a=-15 and ab=8 

solve these two equations, you can get a=1 and b=-8

so 2x^2-15x-8=(2x+1)(x-8)=0

Mar 3rd, 2015

Are you studying on the go? Check out our FREE app and post questions on the fly!
Download on the
App Store
...
Mar 3rd, 2015
...
Mar 3rd, 2015
Dec 5th, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer