Question

2-Por meio da formula da Bhaskara,determine as raizes de cada equacao:​

Answer 1

a)

$x = \frac{ - ( - 6) + - \sqrt{( - 6) {}^{2} - 4 \times 1 \times 5} }{2 \times 1} \\ \\ x = \frac{6 + - \sqrt{36 - 20} }{2} \\ \\ x = \frac{6 + - \sqrt{16} }{2} \\ \\ x = \frac{6 + -4 }{2} \\ \\ x. = \frac{6 + 4}{2} \\ \\ x. = 5 \\ \\ x.. = \frac{6 - 4}{2} \\ \\ x.. = 1$

S = {5 e 1}

b) é Um produto notavel

${x}^{2} - 8x + 16 = 0 \\ (x - 4) {}^{2} = 0 \\ x - 4 = 0 \\ x = 4$

S = {4}

c) Produto notavel

$- x {}^{2} + 10x - 25 = 0 \\ {x}^{2} - 10x + 25 = 0 \\ (x - 5) {}^{2} = 0 \\ x - 5 = 0 \\ x = 5$

S = {5}

Answer 2

a- delta=(-6)^2-4×1×5

delta=36-20

delta=16

=

-(-6)+ raiz de16

x= ---------------------------

2×1

=6 + 4

------------

2

x1= 6-4 = 2= 1

2. 2

x2=6+4 = 10 = 5

2. 2

b- delta=(-8)^2-4×1×16

delta =64-64

delta=0

x= -(-8)+ raiz de 0

---------------------------

2 × 1

=8 + 0

-------------

2

x1= 8-0 =8 = 4

2. 2

x2= 8+0 = 4

2

c- delta=10^2-4×(-1)×(-25)

delta=100-100

delta=0

x= -10 + raiz de 0

------------------------

2 × (-1)

= -10 + 0

----------------

-2

x1= -10-0 = -10 = 5

-2. -2

x2= -10+0 = -10 = 5

-2. -2