SOLUTION: how do you use the quadratic formula to solve 5y^2+5y=9? please round to the nearest hundreth
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Question 171872
:
how do you use the quadratic formula to solve 5y^2+5y=9? please round to the nearest hundreth
Answer by
jim_thompson5910(35256)
(
Show Source
):
You can
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Start with the given equation.
Subtract 9 from both sides.
Notice we have a quadratic equation in the form of
where
,
, and
Let's use the quadratic formula to solve for y
Start with the quadratic formula
Plug in
,
, and
Square
to get
.
Multiply
to get
Rewrite
as
Add
to
to get
Multiply
and
to get
.
or
Break up the expression.
So the answers are
or
which approximate to
or
So to the nearest hundredth, the answers are
or