rewrite in standard form 2x^2+4x-1 (answer)

The given expression is 2x2 + 4x - 1 Taking 2 out from the first two terms; 2(x2 + 2x) - 1 Using the coeffient of x in the paranthesis 2; (1/2 X 2)2 = 12 = 1 Adding and subtracting 1 to complete the square in the paranthesis 2(x2 + 2x + 1) - 1 - (2X1) 2(x2...