Question

Not completely sure about the answer. Can someone help solve?
-16t2 + 64t + 4

Answer 1

If you have to factor it the answers -4(4t^2-16t-1)

Answer 2

I need find a solution by either using the quadratic formula, completing the square or factoring in completely.

Answer 3

That's factoring it completely

Answer 4

I assume you are solving
-16t2 + 64t + 4 = 0 ?

as pointed out above, you can factor a -4 out from each term to get
\[ -4(4t^2 -16t -1)=0 \]
divide both sides by 4 to get
\[ 4t^2 -16t -1)=0 \]

now use the quadratic formula to find the two values of "t" that make this equation true.
See http://www.khanacademy.org/math/trigonometry/polynomial_and_rational/quad_formula_tutorial/v/using-the-quadratic-formula
for how to do this

Answer 5

plz help

Answer 6

do u know what the quadratic formula is?