You have come to the correct place if you are looking to solve the quadratic equation 40x squared minus 36x minus 28 equals 0, also known as 40x² - 36x - 28 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to 40x^2 - 36x - 28 = 0, we will start by rewriting the equation in factored form. Then, we will create two separate equations that we can use to solve 40x² - 36x - 28 = 0.
Below is 40x squared minus 36x minus 28 in factored form. As you can see, 40x² - 36x - 28 has been grouped into two sets of parentheses.
(20x - 28)(2x + 1)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to 40x^2 - 36x - 28 = 0.
(20x - 28) = 0
x1 = 1 2/5
(2x + 1) = 0
x2 = -1/2
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