Solve Quadratic

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The questions are carefully graded from easy up to difficult in small steps.

 

From:

Solve 5x² + 6x = 0 or 5x² = 6x

 

through:

Solve x² + 3x + 2 = 0 or 2x² + 8 = 8x or x² − 16 = 0

 

up to :

Solve 18x³ + 24x² + 8x = 0 or 80x² − 245 = 0 or 100x² = 15x + 45.

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