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Check it outSolving Quadratic Equations by Factoring  Problem 9 440 views
Factoring by grouping is a technique that can sometimes be used when you're factoring a polynomial with four terms. To check if factoring by grouping will work, the product of the first and last terms must equal the product of the middle two terms (be sure it's in standard form first!) If grouping will work, draw a vertical line to cut your polynomial into two halves, and then factor each half separately using greatest common factors. If grouping "works," the inside binomials will be the same on both sides. The outside gcf's will become the other binomial factor. FOIL to check your work.
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Sample Problems (15)
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Solving Quadratic Equations by Factoring
Problem 1 12,611 viewsSolve by factoring:
x² + 4x = 0 
Solving Quadratic Equations by Factoring
Problem 2 9,896 viewsSolve by factoring:
x² + 2x = 15 
Solving Quadratic Equations by Factoring
Problem 3 9,161 viewsSolve by factoring:
x² + 6x + 9 = 0 
Solving Quadratic Equations by Factoring
Problem 4 8,837 viewsSolve by factoring:
3x² − 18x = 27 
Solving Quadratic Equations by Factoring
Problem 5 550 views 
Solving Quadratic Equations by Factoring
Problem 6 506 views 
Solving Quadratic Equations by Factoring
Problem 7 438 views 
Solving Quadratic Equations by Factoring
Problem 8 427 views 
Solving Quadratic Equations by Factoring
Problem 9 439 views 
Solving Quadratic Equations by Factoring
Problem 10 429 views 
Solving Quadratic Equations by Factoring
Problem 11 384 views 
Solving Quadratic Equations by Factoring
Problem 12 411 views 
Solving Quadratic Equations by Factoring
Problem 13 383 views 
Solving Quadratic Equations by Factoring
Problem 14 420 views 
Solving Quadratic Equations by Factoring
Problem 15 397 views
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