orianarice orianarice

05-09-2020
Mathematics

contestada

If B = -m +1 - 9m2 and A = m + 9, find an expression that equals 2B – 2A
in standard form.
PLEASE HELP

Respuesta :

jimrgrant1 jimrgrant1

05-09-2020

Answer:

- 18m² - 4m - 16

Step-by-step explanation:

2B - 2A

= 2(- m + 1 - 9m²) - 2(m + 9) ← distribute both parenthesis

= - 2m + 2 - 18m² - 2m - 18 ← collect like terms

= - 18m² - 4m - 16 ← in standard form

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