How do you factor x^2-5=0
Do you remember the special case of factoring the difference of 2 squares ? x² - 5 = (x + √5) (x - √5) That will be zero if either factor is zero. First factor: x + √5 = 0 x = -√5 Second factor: x - √5 = 0 x = √5 =================================== Another way to look at it is just to sit there and LOOK at it. x² - 5 = 0 x² = 5 This is true if x = + or - √5 .