-x^2+4x=-43
I forgot how to do this? Any help would be appreciated.
In google type:
"quadratic equation online "
When you see results clik on
webgraphingcom/quadraticequation_quadraticformula.jsp
type you equation and click solve it
and you will see solution step by step.
Thank you very much :)
Where was this when I was in school?? LOL.
To solve the equation -x^2 + 4x = -43, we can follow these steps:
Step 1: Rewrite the equation in standard form:
-x^2 + 4x + 43 = 0
Step 2: To solve this quadratic equation, we can use the quadratic formula, which is:
x = (-b ± √(b^2 - 4ac)) / (2a)
The equation is in the form ax^2 + bx + c = 0, so in our case, a = -1, b = 4, and c = 43.
Step 3: Plug the values of a, b, and c into the quadratic formula and solve for x:
x = (-4 ± √(4^2 - 4(-1)(43))) / (2(-1))
Step 4: Simplify the expression inside the square root:
x = (-4 ± √(16 + 172)) / (-2)
x = (-4 ± √188) / (-2)
Step 5: Further simplify and solve for x:
x = (-4 ± √188) / (-2)
x = (-4 ± 2√47) / (-2)
Step 6: Divide both the numerator and denominator by -2:
x = 2 ± √47
Therefore, the solutions to the equation -x^2 + 4x = -43 are:
x = 2 + √47
x = 2 - √47