You have come to the correct place if you are looking to solve the quadratic equation 5x squared minus 15x minus 20 equals 0, also known as 5x² - 15x - 20 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to 5x^2 - 15x - 20 = 0, we will start by rewriting the equation in factored form. Then, we will create two separate equations that we can use to solve 5x² - 15x - 20 = 0.
Below is 5x squared minus 15x minus 20 in factored form. As you can see, 5x² - 15x - 20 has been grouped into two sets of parentheses.
(5x - 20)(x + 1)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to 5x^2 - 15x - 20 = 0.
(5x - 20) = 0
x1 = 4
(x + 1) = 0
x2 = -1
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