Hard SAT and ACT Math Problem Quadratic Equations Today I would like to give a hard math problem involving quadratic equations. This question type can show up on both the SAT and ACT. I will provide a full explanation for this problem soon. Feel free to leave your own solutions in the comments. Level 5 Quadratic Equations Which of the following is a quadratic equation that has –5/7 as its only solution? A. 49x2 – 70x + 25 = 0 B. 49x2 + 70x + 25 = 0 C. 49x2 + 35x + 25 = 0 D. 49x2 + 25 = 0 E. 49x2 – 25 = 0 More SAT and ACT Math Problems with Explanations If you are preparing for the SAT or ACT, you may want to take a look at the Get 800 collection of test prep books. And if you liked this article, please share it with your Facebook friends: Comments comments