slug":"which-of-the-following-is-the-solution-to-x2-9-0-rgqlr","difficulty":"easy","question_text":"Which of the following is the solution to $x^2 - 9 < 0$?","choices":[{"id":"a","text":"$$x < -3$ or $x > 3$"},{"id":"b","text":"$$-3 < x < 3$"},{"id":"c","text":"$$x < 3$"},{"id":"d","text":"$$x > -3$"}],"correct_ids":["b"],"solution":"**Step 1:** Factor the quadratic expression.\n\n$$(x - 3)(x + 3) < 0$$\n\n**Step 2:** Identify the roots at $x = 3$ and $x = -3$.\n\n**Step 3:** Test a point between the roots (e.g., $x=0$): $(0-3)(0+3) = -9 < 0$. The condition holds between the roots.","created_at":"2026-06-07T01:35:31.450456+00:00","updated_at":"2026-10-14T04:48:48.195528+00:00","diagram_svg":null,"human_approved":false,"user_approved":false,"ai_approved":false,"ai_review":null,"topic":{"name":"Inequalities","slug":"algebra_inequalities","description":"Linear, quadratic, absolute value inequalities"}},"user":null,"initialGuestCount":0}]}]]}] f:[["$","meta","0",{"name":"viewport","content":"width=device-width, initial-scale=1"}],["$","meta","1",{"charSet":"utf-8"}],["$","title","2",{"children":"Ononot — Which of the following is the solution to x^2 - 9 < 0?"}],["$","meta","3",{"name":"description","content":"Which of the following is the solution to x^2 - 9 < 0?"}],["$","meta","4",{"name":"robots","content":"index, follow"}],["$","link","5",{"rel":"canonical","href":"https://ononot.com/questions/which-of-the-following-is-the-solution-to-x2-9-0-rgqlr"}],["$","meta","6",{"property":"og:title","content":"Ononot — Which of the following is the solution to x^2 - 9 < 0?"}],["$","meta","7",{"property":"og:description","content":"Which of the following is the solution to x^2 - 9 < 0?"}],["$","meta","8",{"property":"og:url","content":"https://ononot.com/questions/which-of-the-following-is-the-solution-to-x2-9-0-rgqlr"}],["$","meta","9",{"property":"og:type","content":"website"}],["$","meta","10",{"name":"twitter:card","content":"summary"}],["$","meta","11",{"name":"twitter:title","content":"Ononot — Which of the follow

Which of the following is the solution to x2−9<0x^2 - 9 < 0x2−9<0?

Which of the following is the solution to $x^2 - 9 < 0$ ?