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statuscvo [17]
2 years ago
5

Solve the equation x^2 - x = 72

Mathematics
1 answer:
hoa [83]2 years ago
3 0
Answer is x=9 or x= -8
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Using the grouping method to factor the polynomial below completely. x^3+2x^2+4x+8
Ivenika [448]

Answer:  (x+2)(x^2+4)

Step-by-step explanation:

x^3+2x^2+4x+8

(x^3+2x^2)+(4x+8)\\x^2(x+2)+4(x+2)

(x+2)(x^2+4)

3 0
3 years ago
Find the fifth roots of 243(cos 260° + i sin 260°)
Charra [1.4K]
<span>use De Moivre's Theorem:

⁵√[243(cos 260° + i sin 260°)] = [243(cos 260° + i sin 260°)]^(1/5)

= 243^(1/5) (cos (260 / 5)° + i sin (260 / 5)°)

= 3 (cos 52° + i sin 52°)

z1 = 3 (cos 52° + i sin 52°) ←← so that's the first root


there are 5 roots so the angle between each root is 360/5 = 72°

then the other four roots are:

z2 = 3 (cos (52 + 72)° + i sin (52+ 72)°) = 3 (cos 124° + i sin 124°)

z3 = 3 (cos (124 + 72)° + i sin (124 + 72)°) = 3 (cos 196° + i sin 196°)

z4 = 3 (cos (196 + 72)² + i sin (196 + 72)°) = 3 (cos 268° + i sin 268°)

z5 = 3 (cos (268 + 72)° + i sin (268 + 72)°) = 3 (cos 340° + i sin 340°) </span>
3 0
3 years ago
Jaclyn has 72 stickers she used 18 for a scrapbook then she gave 7 to her sister how many stickers does she left
deff fn [24]

72-18=54

54-7=47

Answer is: 47

7 0
3 years ago
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A recipe requires 5 cups of sugar. you can only measure with a 3/4 cup. How many 3/4 cups do you need for the recipe?
alekssr [168]

Answer:

1 1/2?

Step-by-step explanation:

7 0
3 years ago
If there is an open circle on a number on a number line, is that number included in the inequality
natta225 [31]
The answer is NO open circle is not included in an inequality. The other person answered it incorrectly
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3 years ago
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