14 points Previous Answers SPreCalc7 3102 A quadratic func

+ 1/4 points | Previous Answers SPreCalc7 3.1.02 A quadratic function f is given. f(x) =x2 + 4x-1 (a) Express f in standard form 2 f(x) =1 (x+2) -31×

Solution

Ans: Ans: Different textbooks have different interpretations of the reference \"standard form\" of a quadratic function. Some say f (x) = ax2 + bx + c is \"standard form\", while others say that f (x) = a(x - h)2 + k is \"standard form\". If we are to write it in the latter form then we have:

(x+2)^2 = x^2 + 4x + 4. Hence, x^2 + 4x - 1 = (x+2)^2 - 5.