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anonymous
 one year ago
plz help will give medal
Evaluate the following expression using the values given:
Find −3a2 − b3 + 3c2 − 2b3 if a = 2, b = −1, and c = 3.
anonymous
 one year ago
plz help will give medal Evaluate the following expression using the values given: Find −3a2 − b3 + 3c2 − 2b3 if a = 2, b = −1, and c = 3.

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zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1\[\large\rm \color{orangered}{a=2},\qquad\color{royalblue}{b=1},\qquad\color{#A57F02}{c=3}\] \[\large\rm −3\color{orangered}{a}^2 − \color{royalblue}{b}^3 + 3\color{#A57F02}{c}^2 − 2\color{royalblue}{b}^3\]So plug in your values,\[\large\rm −3\color{orangered}{(2)}^2 − \color{royalblue}{(1)}^3 + 3\color{#A57F02}{(3)}^2 − 2\color{royalblue}{(1)}^3\] And simplify! :)

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1\[\large\rm −3(2)^2 − (1)^3 + 3(3)^2 − 2(1)^3\] \[\large\rm −3(4) − (1) + 3(9) − 2(1)\] \[\large\rm −12 +1 + 27 +2\] 48? Hmm that doesn't sound quite right.

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1\[\large\rm −12 +1 + 27 +2\]\[\large\rm −12 +30\]Hmmm 22 doesn't sound quite right either :D lol

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.112 + 30 is the same as 30  12
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