Question

Resolva as expressões:

A) (-7)² - 1⁹ + {0 . (-5)³ - 4² +[35¹ . 4 -(9² : 3 +(- 2)⁴]}
B) {6¹ : (-3) + 7 . (-2) -[9² . 2 - 4 : 2² + (3³ . 2¹ - 5² : (-5)]}
C) (-64) : 2² + {(-2)⁶ : 4¹ + [10³ - (128 : (- 2)⁴ + 243 : (-3)³ - (-9)² : 3¹]}

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Answer 1

Explicação passo-a-passo:

7=0

\boxed{a = 1 \: ,\: b = 6 \: , \: c = - 7}

a=1,b=6,c=−7

\begin{gathered}x = \frac{ - b± \sqrt{b {}^{2} - 4ac} }{2a} \\ x = \frac{ - 6± \sqrt{6 {}^{2} - 4 \: . \: 1 \: . \: ( - 7) } }{2 \: . \: 1} \\ x = \frac{ - 6± \sqrt{36 + 28} }{2} \\ x = \frac{ - 6± \sqrt{64} }{2} \\ x = \frac{ - 6±8}{2} \\ x = \frac{ - 6 + 8}{2} = \frac{2}{2} = \boxed{1} \\ x = \frac{ - 6 - 8}{2} = \frac{ - 14}{2} = \boxed{ - 7}\end{gathered}

x=

2a

−b±

b

2

−4ac

x=

2.1

−6±

6

2

−4.1.(−7)

x=

2

−6±

36+28

x=

2

−6±

64

x=

2

−6±8

x=

2

−6+8

=

2

2

=

1

x=

2

−6−8

=

2

−14

=

−7

\boxed{S = \left \{ 1 \: , \: - 7\right \}}

S={1,−7}

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