You have come to the correct place if you are looking to solve the quadratic equation negative 5x squared plus 12x plus 81 equals 0, also known as -5x² + 12x + 81 = 0. Below, we walk you through how to find the answer.
To find the two possible answers to -5x^2 + 12x + 81 = 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 + 12x + 81 = 0.
Below is negative 5x squared plus 12x plus 81 in factored form. As you can see, -5x² + 12x + 81 has been grouped into two sets of parentheses.
-(5x - 27)(x + 3)
Next, we set each set of parentheses equal to 0 and solve for x to get the two answers to -5x^2 + 12x + 81 = 0.
(5x - 27) = 0
x1 = 5 2/5
(x + 3) = 0
x2 = -3
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