2 years ago

Use FOIL method to find the product of (3x-2) and (2x+6)

Mathematics

2 answers:

Dima020 [189]2 years ago

8 0

It would be 6x^2 + 14x -12

Verdich [7]2 years ago

7 0

Answer:

6x^2 +14x-12

Step-by-step explanation:

(3x -2)(2x +6)

1) Multiply 3x and 2x to get 6x^2

2) Multiply 3x and 6 to get 18x

3) Multiply -2 and 2x to get -4x

4) Multiply -2 and 6 to get -12

5) You should get 6x^2 +18x -4x -12

6) Combine like terms and you should get 6x^2 +14x -12

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Sedbober [7]

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3 years ago

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A triangle has sides of length 2, 2, and 3. Which of the following is the measure of the obtuse angle of the triangle?

kramer

Answer:

$97.18^{\circ}$

Step-by-step explanation:

An obtuse angle in the triangle is opposite to the greatest side. The greatest side in the triangle with sides lengths 2, 2 and 3 is side with length 3. By the cosine rule,

$3^2=2^2+2^2-2\cdot 2\cdot 2\cdot \cos \alpha,\\ \\9=4+4-8\cos \alpha,\\ \\-8\cos \alpha=9-4-4=1,\\ \\\cos \alpha=-\dfrac{1}{8},\\ \\\alpha\approx 97.18^{\circ}.$