1) 3r² – 2r=-9
Quadratic formula

Solving the equation using quadratic formula we get:

Step-by-step explanation:

We need to solve the equation using quadratic formula.

The quadratic formula is:

For the given equation:

We can write it as:

We have a = 3, b= -2 and c=9

Putting values in quadratic formula and finding value of r

So, solving the equation using quadratic formula we get:

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b

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