math help plz?

Question

if factored completely, the expression 2y^2+12y-54 is equivalent to what...


the help is needed...thanxx

Answer 1

This is not an eqn. You have to simply factorize the expression.

2y^2+12y-54

= 2 ( y^2 + 6y - 27)

=> 2 [ y^2 + 9y - 3y - 27 ]

=> 2 [ y ( y + 9 ) - 3 ( y + 9 ) ]

=> 2. ( y + 9 ) ( y - 3 ) ....................... Answer

Answer 2

first take out the two
2(y^2+6y-27)
and then factor
2(y-3)(y+9)
then check it to make sure
so multiply it out y^2+9y-3y-27
combine y's and y^2+6y-27
then multiply by the two
2y^2+12y-54
which is the correct answer!
so
2(y-3)(y+9) is equivalent to 2y^2+12y-54
and other peeps
it doesn't ask for what y equals just the equivalent expression :)

Answer 3

first of all, this is only an EXPRESSION not an EQUATION,
so you cannot solve for y
you can factor it...
~ 2y^2 + 12y - 54
~ (2)( y^2 + 6y - 27) ....... find factors of -27 that add to 6, such
as 9 and -3
~ (2)(y+9)(y-3)........ <- answer

Answer 4

2y^2+12y+54

Multiply 54 into 2 and prime factorise it.
The factors will be 2,2,3,3,3.
Now try to make a combination that will give you 12.
The combination will be 3x3x2-3x2
This means 18-6
18-6 is 12 therfore take this combination.
Now you will get, 2y^2+18y-6y-54
Take the common factor out,that is
2y(y+9)-6(y+9)
therefore y=-9 or y=6/2=3
therefore y=-9,3

Answer 5

2y^2+12y-54

(2y-6)(y+9)
2y-6=0
y+9=0
y=3 or -9

Answer 6

You can check out www.gobakersfield.net and click on GoEducation, you will find math homework links and the famous Algebrator. This is a calculator that will do your homework step-by-step (your personal tutor)... Hope this help, as it has helped me.

Answer 7

(2)(y+9)(y-3)

Answer 8

2(y^2+6y-27)
2(y+9)(y-3)
y= - 9,3

Answer 9

well if you're 8th grade or younger, i would go to www.aaamath.com or www.aplusmath.com. If you're college or HS level, i woul go to www.algebrahelp.com or www.geometry.com.