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mars1129 [50]
3 years ago
9

PLEASE help me:( i'm desperate (and dumb): factor 2n^(3)+7n^(2)-2n-7

Mathematics
2 answers:
mario62 [17]3 years ago
4 0

x {}^{2}(2x + 7) - (2x + 7) \\ (2x + 7)(x {}^{2}  - 1) \\ (2x + 7)(x - 1)(x + 1)
Murljashka [212]3 years ago
4 0

2n^(3)+7n^(2)-2n-7

factor by grouping

2n^3 -2n  + 7n^2-7

2n(n^2-1) + (7(n^2-1)

factor n^2-1 out

(n^2-1) (2n+7)

factor (n^2-1)

(n-1) (n+1) (2n+7)

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The measure of m<JMO is 20 degrees

The triangle JOK is a 60 degrees equilateral triangle. Hence the measure of m<O at the center is 60 degrees.

<h3>Angle at a point</h3>
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Since the base angles of triangle KOL and OLM are equal hence;

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Substitute the base angles and the equilateral angles to get angle JOM

80 + 80 + m<JOM + 60 = 360

m<JOM = 360 - 360 - 220

m<JOM = 140 degrees

<h3>Sum of angles in a triangle</h3>

Since the sum of angle in the triangle JOM is 180 degrees, hence;

2m<JMO + m<JOM = 180

2m<JMO = 180 - 140

2m<JMO = 40

m<JMO = 20 degrees

Hence the measure of m<JMO is 20 degrees

Learn more on angles here: brainly.com/question/25770607

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