Identify the quadratic equation: Identify the quadratic equation to be solved.The given quadratic equation is x2−20x+100=0.
Determine factoring possibility: Determine if the quadratic can be factored easily.We need to find two numbers that multiply to 100 and add up to −20. The numbers −10 and −10 fit these criteria.
Write factored form: Write the factored form of the quadratic equation.The equation can be factored as (x−10)(x−10)=0.
Solve for x: Set each factor equal to zero and solve for x.First factor: x−10=0, so x=10.Second factor: Since it is the same as the first factor, it will give the same solution, x=10.
State the solution: State the solution to the quadratic equation.The solution is x=10, which is a repeated root since both factors are the same.
More problems from Solve a quadratic equation by factoring