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  1. 求解 x^2+3x-4=0 | Microsoft Math Solver

  2. Solve x^2+3x-4 | Microsoft Math Solver

  3. Graph y=x^2+3x-4 - Mathway

  4. Solve x^2+3x=4 | Microsoft Math Solver

  5. Solve for x Calculator - Mathway

  6. x^2+3x-4 - Symbolab

  7. 方程计算器 - Symbolab 数学求解器

  8. Solve For x Calculator - Symbolab

  9. Factor x^2-3x-4 | Mathway

  10. Microsoft Math Solver - Math Problem Solver & Calculator