Expansion 2 by 2 linear expressions Flashcards by Christopher Chee | Brainscape

Q

What is the expansion of (a+b)(c+d)

A

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Q

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(x + 3)(x + 2)

A

x² + 3x + 2x + 6

= x² + 5x + 6

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Q

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(x + 3)(x - 2)

A

x² + 3x - 2x - 6

= x² + x - 6

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Q

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(x - 3)(x + 2)

A

x² - 3x + 2x - 6

= x² - x - 6

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Q

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(x - 3)(x - 2)

A

x² - 3x - 2x - 6

= x² - 5x - 6

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Q

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(2x + 3)(x + 2)

A

2x² + 3x + 4x + 6

= 2x² + 7x + 6

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Q

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(2x + 3)(x - 2)

A

2x² + 3x - 4x - 6

= 2x² - x - 6

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Q

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(2x - 3)(x + 2)

A

2x² - 3x + 4x - 6

= 2x² + x - 6

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Q

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(2x - 3)(x - 2)

A

2x² - 3x - 4x + 6

= 2x² - 7x + 6

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Q

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(x + 3)(x + 3)

A

x² + 3x + 3x + 9

= x²+ 6x + 9

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Q

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(x - 3)(x - 3)

A

x² - 3x - 3x + 9

= x²- 6x + 9

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Q

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(x - 3)(x + 3)

A

x² - 3x + 3x - 9

= x²- 9

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Q

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(x + 3)(x - 3)

A

x² + 3x - 3x - 9

= x²- 9

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