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Check it outSolving Quadratic Equations by Factoring  Problem 15 403 views
Technically, we're allowed to do anything to an equation as long as we do it to both sides of an equation. This includes dividing: we could divide by a number (or constant) or even divide by a variable, BUT... in dividing by a variable, though it is technically mathematically correct, we would lose a solution to a quadratic equation. As shown here, the best method is always to set the equation equal to zero, factor, and then solve using the zero product property rather than divide by a variable.
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Sample Problems (15)
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Solving Quadratic Equations by Factoring
Problem 1 12,618 viewsSolve by factoring:
x² + 4x = 0 
Solving Quadratic Equations by Factoring
Problem 2 9,905 viewsSolve by factoring:
x² + 2x = 15 
Solving Quadratic Equations by Factoring
Problem 3 9,168 viewsSolve by factoring:
x² + 6x + 9 = 0 
Solving Quadratic Equations by Factoring
Problem 4 8,841 viewsSolve by factoring:
3x² − 18x = 27 
Solving Quadratic Equations by Factoring
Problem 5 556 views 
Solving Quadratic Equations by Factoring
Problem 6 511 views 
Solving Quadratic Equations by Factoring
Problem 7 441 views 
Solving Quadratic Equations by Factoring
Problem 8 430 views 
Solving Quadratic Equations by Factoring
Problem 9 442 views 
Solving Quadratic Equations by Factoring
Problem 10 434 views 
Solving Quadratic Equations by Factoring
Problem 11 386 views 
Solving Quadratic Equations by Factoring
Problem 12 415 views 
Solving Quadratic Equations by Factoring
Problem 13 383 views 
Solving Quadratic Equations by Factoring
Problem 14 423 views 
Solving Quadratic Equations by Factoring
Problem 15 402 views
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