You have come to the correct place if you are looking to solve the quadratic equation negative 15x squared minus 28x plus 99 equals 0, also known as -15x² - 28x + 99 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to -15x^2 - 28x + 99 = 0, we will start by rewriting the equation in factored form. Then, we will create two separate equations that we can use to solve -15x² - 28x + 99 = 0.
Below is negative 15x squared minus 28x plus 99 in factored form. As you can see, -15x² - 28x + 99 has been grouped into two sets of parentheses.
-(5x - 9)(3x + 11)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to -15x^2 - 28x + 99 = 0.
(5x - 9) = 0
x1 = 1 4/5
(3x + 11) = 0
x2 = -3 2/3
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