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andriy [413]
2 years ago
12

Solve the equation. √x-4=8 The solution isx =

Mathematics
2 answers:
inysia [295]2 years ago
5 0

Answer:

x = 68

Step-by-step explanation:

Black_prince [1.1K]2 years ago
3 0

Answer:

x = 68

Step-by-step explanation:

Square both sides of the equation. This gives us:

x - 4 = 64

Then add 4 on both sides. This gives us:

x = 68

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Step-by-step explanation:

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2 years ago
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s344n2d4d5 [400]

I've answered your other question as well.

Step-by-step explanation:

Since the identity is true whether the angle x is measured in degrees, radians, gradians (indeed, anything else you care to concoct), I’ll omit the ‘degrees’ sign.

Using the binomial theorem, (a+b)3=a3+3a2b+3ab2+b3

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Using the trigonometric identity cos2(x)+sin2(x)=1, your expression simplifies to:

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From the double angle formula for the sine function, sin(2x)=2sin(x)cos(x)⇒sin(x)cos(x)=0.5sin(2x)

Meaning the expression can be rewritten as:

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Step-by-step explanation:

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