Question
Solve the following equation using the formula
`x^2 + 10x + 21 = 0`
Solution
`x^2 + 10x + 21 = 0`
Here a = 1, b = -10 and c = 21
Then `x = (-b +- sqrt(b^2 - 4ac))/(2(1))`
`= (-(-10) +- sqrt((-10)^2 - 4(1)(21)))/(2(1))`
`= (10 + - 4)/2 = (10 + 4)/2 and (10 - 4)/2 = 7 and 3`
Is there an error in this question or solution?
Solution Solve the Following Equation Using the Formula X^2 + 10x + 21 = 0 Concept: Solutions of Quadratic Equations by Factorization.
