You have come to the correct place if you are looking to solve the quadratic equation negative 81x squared minus 72x minus 7 equals 0, also known as -81x² - 72x - 7 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to -81x^2 - 72x - 7 = 0, we will start by rewriting the equation in factored form. Then, we will create two separate equations that we can use to solve -81x² - 72x - 7 = 0.
Below is negative 81x squared minus 72x minus 7 in factored form. As you can see, -81x² - 72x - 7 has been grouped into two sets of parentheses.
-(9x + 1)(9x + 7)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to -81x^2 - 72x - 7 = 0.
(9x + 1) = 0
x1 = -1/9
(9x + 7) = 0
x2 = -7/9
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