Question

Quadratic equations: x^2+2x=63

Answer 1

`Equate\ the\ equation\ to\ 0.\\\\x^2+2x-63=0.\\\\Now\ use\ the\ quadratic\ equation.\\\\For\ ax^2+bx+c\\\\(-b\pm \!\, √(b^2-4ac) )/(2a).\\\\a\ is\ 1,\ b\ is\ 2,\ and\ c\ is\ -63.\\\\(-2\pm \!\, √(2^2-4(1)(-63)) )/(2(1))\\\\(-2\pm \!\, √(4-(-252)) )/(2)\\\\(-2\pm \!\, √(256) )/(2)\\\\(-2\pm \!\, 16)/(2)`