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3 years ago

What is the answer for this in square root form

Mathematics

1 answer:

vredina [299]3 years ago

4 0

Answer:

x = ± sqrt(-49)

or x = ± 7i

Step-by-step explanation:

x^2 +49 = 0

Subtract 49 from each side

x^2 +49 -49 = 0-49

x^2 = -49

Take the square root of each side

sqrt(x^2) = ± sqrt(-49)

x = ± sqrt(-49)

We have to complex numbers to solve

x = ± sqrt(-1) sqrt(49)

sqrt(-1) = i

x = ±i *7

x = ± 7i

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Step-by-step explanation:

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3 years ago

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2 years ago

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Answer:

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Step-by-step explanation:

It's clear from the graph,

Polygon ABCDE is reflected across x-axis then dilated so that it overlaps polygon A'B'C'D'E'

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By reflecting point A across x-axis,

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(x, y) → (x, -y)

By this rule, coordinates of the image point A will be,

A(-2, -1) → A"(-2, 1)

Now point A"(-2, 1) has been dilated by a scale factor = k to form an image points A'(-4, 2).

Rule for the dilation of a point about the origin is,

A"(x, y) → A'(kx, ky)

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Since, coordinates of point A' are (-4, -2),

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3 years ago