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Katena32 [7]
3 years ago
9

Multiply. (2x2 – 3x)(3x2 + 2x - 1)

Mathematics
1 answer:
exis [7]3 years ago
8 0

Answer:

-6x^{2} –7x + 20

Step-by-step explanation:

(2x2 – 3x)(3x2 + 2x – 1)

(4 – 3x)(2x + 5)

(4*2x) + (4*5) + (–3x*2x) + (–3x*5)

8x + 20 -6x^{2} –15x

-6x^{2} –7x + 20

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Answer:

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Step-by-step explanation:

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A triangle has side lengths of 9 in, 13 in, and 20 in. What is the measurement of this triangle’s largest angle?
zvonat [6]
1. Given any triangle ABC with sides BC=a, AC=b and AB=c, the following are true :

      i) the larger the angle, the larger the side in front of it, and the other way around as well. (Sine Law) Let a=20 in, then the largest angle is angle A.

       ii) Given the measures of the sides of a triangle. Then the cosines of any of the angles can be found by the following formula:

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2. 

20^{2}=9 ^{2}+13 ^{2}-2*9*13(cosA)

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Answer:

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Step-by-step explanation:

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