Final answer to the problem
Step-by-step Solution
How should I solve this problem?
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- Solve for x
- Find the roots
- Solve by factoring
- Solve by completing the square
- Solve by quadratic formula (general formula)
- Find break even points
- Find the discriminant
- Exact Differential Equation
- Linear Differential Equation
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To find the roots of a polynomial of the form $ax^2+bx+c$ we use the quadratic formula, where in this case $a=1$, $b=2$ and $c=-1$. Then substitute the values of the coefficients of the equation in the quadratic formula: $\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$
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$x=\frac{-2\pm \sqrt{2^2-4\cdot -1}}{2}$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation x^2+2x+-1=0. To find the roots of a polynomial of the form ax^2+bx+c we use the quadratic formula, where in this case a=1, b=2 and c=-1. Then substitute the values of the coefficients of the equation in the quadratic formula: \displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}. Simplifying. To obtain the two solutions, divide the equation in two equations, one when \pm is positive (+), and another when \pm is negative (-). Subtract the values 2\sqrt{2} and -2.