You have come to the correct place if you are looking to solve the quadratic equation negative 3x squared minus 36x minus 81 equals 0, also known as -3x² - 36x - 81 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to -3x^2 - 36x - 81 = 0, we will start by rewriting the equation in factored form. Then, we will create two separate equations that we can use to solve -3x² - 36x - 81 = 0.
Below is negative 3x squared minus 36x minus 81 in factored form. As you can see, -3x² - 36x - 81 has been grouped into two sets of parentheses.
-(3x + 9)(x + 9)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to -3x^2 - 36x - 81 = 0.
(3x + 9) = 0
x1 = -3
(x + 9) = 0
x2 = -9
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