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kkurt [141]
3 years ago
12

What is the value of the product (3 - 2i) (3 +2i)? O 5 9 + 4; 9 – 4;

Mathematics
1 answer:
blondinia [14]3 years ago
7 0

Answer:

9-4i²

Step-by-step explanation:

(3-2i)(3+2i)

Use the FOIL method for this.

First: 9

Outer: 6i

Inner: -6i

Last: -4i²

9+6i-6i-4i²=

9-4i²

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Given h(x) = x2 – 5x + 7, find the following.<br> a. h(2)<br> b.h(-5)<br> c. h(-8)
azamat

Answer:

Step-by-step explanation:

hello :

h(x) = x² – 5x + 7

h(-2) = (-2)² – 5(-2) + 7 =4+10+7 =21

h(-5) = (-5)² – 5(-5) + 7= 25+25+7 =57

h(-8) = (-8)² – 5(-8) + 7 = 64+40+7=111

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2 years ago
A 12 foot ladder is leaning up against a wall. If the angel made between the ladder and the ground is 80 degrees. How far up can
lorasvet [3.4K]

Answer:

<h3>11.8 feet</h3>

Step-by-step explanation:

Given

Length of the ladder = 12foot

angle of elevation = 80 degrees

Required

Height of the wall (opposite side)

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height of the wall is opposite;

Using SOH, CAH, TOA trig identity

According to SOH

sin 80 = opp/hyp

sin80 = opp/12

opp = 12sin80

opp = 11.82 feet

Hence the height of the wall is 11.8feet (to the nearest tenth)

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