Question

Which is the correct first step for using the Quadratic Formula to solve the quadratic below?

y=2x^2+x+5



(1 point)

−1±√1^2−4(2)(5)/2(2)

−(5)±√(5)^2−4(1)(2)√/2(1)

−2±√(2)^2−4(5)(1)√/2(5)

Answer 1

Use a = 2, b = 1, c = 5 in x = [-b ± √(b^2 − 4ac)]/(2a). Substituting gives

x = [−1 ± √(1^2 − 4(2)(5))]/(2(2)),

so the first choice is correct.