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DanielleRodrigues11
@DanielleRodrigues11
November 2019
1
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Me ajudem a calcular o valor das expressões:
a) 2a²-b a= -3 b= 1
b) b²- 4.a.c. a= -3 b= 2 c= 1
c) x+y-a x= 2 y=3 a=2
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Comentários (2)
Olá!!!
Resolução!!!
a)
= 2a² - b
= 2 • ( - 3 )² - 1
= 2 • 9 - 1
= 18 - 1
= 17
b)
= b² - 4 • a • c
= 2² - 4 • ( - 3 ) • 1
= 4 - 4 • ( - 3 )
= 4 + 12
= 16
c)
= x + y - a
= 2 + 3 - 2
= 2 + 1
= 3
Espero ter ajudado!!!
0 votes
Thanks 2
DanielleRodrigues11
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Resolução!!!
a)
= 2a² - b
= 2 • ( - 3 )² - 1
= 2 • 9 - 1
= 18 - 1
= 17
b)
= b² - 4 • a • c
= 2² - 4 • ( - 3 ) • 1
= 4 - 4 • ( - 3 )
= 4 + 12
= 16
c)
= x + y - a
= 2 + 3 - 2
= 2 + 1
= 3
Espero ter ajudado!!!