SOLUTION: z(5z-1)=3z(z+3) "solve by suitable methods"....whatever that means. :)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: z(5z-1)=3z(z+3) "solve by suitable methods"....whatever that means. :)      Log On


   

Question 1922: z(5z-1)=3z(z+3)
"solve by suitable methods"....whatever that means. :)
Answer by smartdude17(30) About Me  (Show Source):
You can put this solution on YOUR website!
z(5z-1)=3z(z+3) Well, first you need to clear parenthesis.
5z^2-z=3z^2+9z Invert to = the formula.
2z^2=10z Now you invert 10z so it resembles the formula.
2z^2-10z=0 Do QF.
x=%28-b%2B-sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29
x=%2810%2B-sqrt%28100%29%29%2F%284%29
AFTER YOU DO THE WORK (THIS THING KEEPS SAYING I DID IT WRONG!) THE ANSWER =:
z=5,0 Let's Check!
5(25-1)=15(8)
120=120
0(0-1)=0(0+3)
0=0