SOLUTION: Please help me solve this question: {{{x^2-2x-15=0}}}

Question 6500: Please help me solve this question:
Answer by ichudov(507) (Show Source): You can put this solution on YOUR website!

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=64 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 5, -3. Here's your graph:

RELATED QUESTIONS
Please help me solve this question x^2/2 +... (answered by josgarithmetic)

please help me solve this problem.... (answered by stanbon)

Please help me solve this question -x+y=1 2x+y=-2 Solve using substitution... (answered by BGutridge)

please help me solve this question!... (answered by smart1)

Please help me solve this question... (answered by richwmiller)

please help me answer this question {{{ x^2-2x+1-8(x-1)-20=0}}} (answered by edjones)

Solve: 15(3^x + 1) - 243(5^x - 2) = 0 (Exponential and logarithmic functions)... (answered by Alan3354)

Please help me solve this equation:... (answered by wvgirl64)

Please help me solve this equation:... (answered by vleith)