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yKpoI14uk [10]
2 years ago
14

The quadratic function f(x) = x^2 + 8x + 17 is equal to zero when x - a + bi

Mathematics
1 answer:
aleksley [76]2 years ago
3 0

Answer:

x

2

−

8

x

−

17

=

0

Use the quadratic formula to find the solutions.

−

b

±

√

b

2

−

4

(

a

c

)

2

a

Substitute the values

a

=

1

,

b

=

−

8

, and

c

=

−

17

into the quadratic formula and solve for

x

.

8

±

√

(

−

8

)

2

−

4

⋅

(

1

⋅

−

17

)

2

⋅

1

Simplify.

Tap for more steps...

x

=

4

±

√

33

The result can be shown in multiple forms.

Exact Form:

x

=

4

±

√

33

Decimal Form:

x

=

9.74456264

…

,

−

1.74456264

…

Step-by-step explanation:

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A rectangular tank 60 cm long and 50 cm wide is /5 full of water. When 24 liters of water are added, the water level rises to th
bija089 [108]

Answer:

The tank is 10cm high

Step-by-step explanation:

Given

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W=60cm -- width

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Required

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Substitute: y = \frac{4}{5}

v = \frac{24L}{4/5}

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So, the volume of the tank is:

v = lwh

Make h the subject

h = \frac{v}{lw}

Substitute values for v, l and w

h = \frac{30L}{60cm * 50cm}

Convert 30L to cm^3

h = \frac{30*1000cm^3}{60cm * 50cm}

h = \frac{30000cm^3}{3000cm^2}

h = 10cm

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3 years ago
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