THE FIRST ONE WILL SERVE AS YOUR GUID.
1. (x + 1) (x - 2)
(x + 1) (x - 2) = x (x - 2) + 1 (x - 2)
=
[tex] {x}^{2} \: - \: 2x \: + \: x - 2[/tex]
Show your solution:
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2. (x + 2) (x -4)
3. (2a - 1) (a - 3)
1. (x + 1) (x - 2)
(x + 1) (x - 2) = x (x - 2) + 1 (x - 2)
=
[tex] {x}^{2} \: - \: 2x \: + \: x - 2[/tex]
Show your solution:
---------------------
2. (x + 2) (x -4)
3. (2a - 1) (a - 3)
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Answer:
2. x² - 2x - 8
3. 2a² - 7a + 3
Step-by-step explanation:
2.) = x * x - 4x + 2x - 2 × 4
= x² - 4x + 2x - 8
= x² - 2x - 8
3.) = 2a × a - 2a × 3 - a - 1 ( - 3)
= 2a² - 6a - a + 3
= 2a² - 7a + 3