You have come to the correct place if you are looking to solve the quadratic equation negative 15x squared minus 68x minus 21 equals 0, also known as -15x² - 68x - 21 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to -15x^2 - 68x - 21 = 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 - 68x - 21 = 0.
Below is negative 15x squared minus 68x minus 21 in factored form. As you can see, -15x² - 68x - 21 has been grouped into two sets of parentheses.
-(3x + 1)(5x + 21)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to -15x^2 - 68x - 21 = 0.
(3x + 1) = 0
x1 = -1/3
(5x + 21) = 0
x2 = -4 1/5
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