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Ostrovityanka [42]
3 years ago
5

What is thr answer of (a-b) (a+2b)​

Mathematics
1 answer:
kari74 [83]3 years ago
3 0

Answer:

Step-by-step explanation:

Use FOIL method

F -> First

O Outside

I inside

L Last

(a - b)(a + 2b)= a*a + a *2b + (-b)*a + (-b)*2b

                     = a² + <u>2ab - ab</u> - 2b²

Combine like terms

                       = a² + ab - 2b²

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