Solve -3x^2-4x-4=0. use the quadratic formula.

Step-by-step explanation:

we have

Rewrite (Multiply by both sides)

The formula to solve a quadratic equation of the form is equal to

in this problem we have

so

substitute

remember that

Simplify

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2