You have come to the correct place if you are looking to solve the quadratic equation 16x squared minus 16x minus 21 equals 0, also known as 16x² - 16x - 21 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to 16x^2 - 16x - 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 16x² - 16x - 21 = 0.
Below is 16x squared minus 16x minus 21 in factored form. As you can see, 16x² - 16x - 21 has been grouped into two sets of parentheses.
(4x - 7)(4x + 3)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to 16x^2 - 16x - 21 = 0.
(4x - 7) = 0
x1 = 1 3/4
(4x + 3) = 0
x2 = -3/4
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