{"id":"cb_practice_pdf:t11-math-m1-q16","source_id":"cb_practice_pdf","source_item_id":"t11-math-m1-q16","external_id":null,"ibn":null,"question_id":null,"program":"SAT","module":"math","domain_code":null,"domain":null,"skill_code":null,"skill":null,"difficulty":null,"score_band":null,"answer_type":"mcq","answer_source":"rationale","layout_warning":null,"form_id":"cb_practice_pdf:test-11","module_number":1,"position":16,"stem":"16 Which quadratic equation has exactly one distinct real solution?","stimulus":"","stimulus_html":null,"stem_html":"<p>16 Which quadratic equation has exactly one distinct real solution?</p>","rationale_html":"<p>+15 2=0 Choice A is correct. Taking the square root of both sides of ^x h yields +15=0 15 =-15 x . Subtracting from both sides of this equation yields x . Therefore, this equation has exactly one distinct real solution. Choice B is incorrect. This equation has no distinct real solutions, not exactly one distinct real solution. Choice C is incorrect. This equation has exactly two distinct real solutions, not exactly one distinct real solution. Choice D is incorrect. This equation has exactly two distinct real solutions, not exactly one distinct real solution.</p>","correct_answer":["A"],"has_media":false,"has_mathml":false,"has_table":false,"source_created_at":null,"source_updated_at":null,"options":[{"label":"A","content_html":"<p>x + 15 = 0 ^ h^2</p>","ord":0},{"label":"B","content_html":"<p>x + 15 = - 45 ^ h^2 + =</p>","ord":1},{"label":"C","content_html":"<p>x 15 45 ^ h^2</p>","ord":2},{"label":"D","content_html":"<p>x + 15 = 135 ^ h^2</p>","ord":3}],"attribution":{"source_id":"cb_practice_pdf","source_name":"College Board full-length SAT practice tests (PDF)","rights_holder":"College Board","canonical_url":"https://satsuite.collegeboard.org/practice/practice-tests/paper","retrieved_from":"https://satsuite.collegeboard.org/practice/practice-tests/paper","attribution":"Full-length SAT practice tests 4–11 © College Board, published free at satsuite.collegeboard.org.","disclaimer":"Extracted from PDF layout: equations, figures and tables do not survive intact. Use the original PDFs for anything the text renders poorly. SAT® is a trademark registered by the College Board, which is not affiliated with and does not endorse this project.","license":"College Board copyright. Free to download; not licensed for redistribution.","redistributable":false,"item_count":905}}