Question 43 Answer and Explanation _ACT April 2010 Form 68G Math Section

Question 43 Answer and Explanation _ACT April 2010 Form 68G Math Section

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43. Which of the following equations shows a correct use of the quadratic formula to solve x² - 5x + 3 = 0 ?

A. $x=\frac{5\pm\sqrt{25-4(1)(3)}}{2(1)}$

B. $x=\frac{5\pm\sqrt{25+4(1)(3)}}{2(1)}$

C. $x=\frac{-5\pm\sqrt{25-4(1)(-3)}}{2(1)}$

D. $x=\frac{-5\pm\sqrt{25-4(1)(3)}}{2(1)}$

E. $x=\frac{-5\pm\sqrt{25+4(1)(3)}}{2(1)}$

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation