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3 years ago

Simplify the following expression.

Mathematics

1 answer:

jeyben [28]3 years ago

7 0

Answer:

8x + 2y

Step-by-step explanation:

You need to use distributive property.

5(x + y)

5 · x = 5x

5 · y = 5y

3(x - y)

3 · x = 3x

3 · -y = -3y (don't forget the sign)

So,

5x + 5y + 3x - 3y

Arrange them,

5x + 3x + 5y - 3y

Simplify,

5x + 3x = 8x

5y - 3y = 2y

So,

8x + 2y

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tigry1 [53]

Answer:

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Step-by-step explanation:

By the cos double angle formula, we know $\cos(2\theta)=2\cos^2\theta-1.$ Substituting $\cos \theta$ into the formula, we get

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2 years ago

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iVinArrow [24]

Answer:

Step-by-step explanation:

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3 years ago

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Answer:

Step-by-step explanation:

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3 years ago

Use the quadratic formula to find the solutions to the equation x^2-3x+1=0

Gnom [1K]

Answer:

$x_{1}=\frac{+3+\sqrt{5} }{2}\\\\x_{2}=\frac{+3-\sqrt{5} }{2}$

Step-by-step explanation:

Using:

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