You have come to the correct place if you are looking to solve the quadratic equation 42x squared minus 80x minus 72 equals 0, also known as 42x² - 80x - 72 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to 42x^2 - 80x - 72 = 0, we will start by rewriting the equation in factored form. Then, we will create two separate equations that we can use to solve 42x² - 80x - 72 = 0.
Below is 42x squared minus 80x minus 72 in factored form. As you can see, 42x² - 80x - 72 has been grouped into two sets of parentheses.
(14x - 36)(3x + 2)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to 42x^2 - 80x - 72 = 0.
(14x - 36) = 0
x1 = 2 4/7
(3x + 2) = 0
x2 = -2/3
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