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Ne4ueva [31]
3 years ago
6

SOLVING QUADRATIC EQUATIONS 2) Solve 2x2 - 5 = 27

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
7 0

Answer:

x = ±4

Step-by-step explanation:

Step 1: Write out quadratic

2x² - 5 = 27

Step 2: Add 5 to both sides

2x² = 32

Step 3: Divide both sides by 2

x² = 16

Step 4: Take the square root of both sides

x = ±4

∴ x can equal -4 or 4

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Find the solution set for this equation.<br> a2 + 7a=0
aivan3 [116]

Answer:

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Step-by-step explanation:

Pull out like factors:

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5 0
3 years ago
The sum of the measures of angles for a triangle is 180°. Find the value of x and then the measures of the 3 angles
dmitriy555 [2]

Answer:

The value of x is 50

The measures of the 3 angles are 50°, 100°, 30°

Step-by-step explanation:

Let us solve the question

∵ The sum of the measures of the angles of a triangle is 180°

∵ The measures of the 3 angles of the given Δ are x°, 2x°, (x - 20)°

→ Add them and equate the sum by 180

∴ x° + 2x° + (x - 20)° = 180°

→ Add the like terms

∵ (x + 2x + x) + (-20) = 180

∴ 4x - 20 = 180

→ Add 20 to both sides

∵ 4x - 20 + 20 = 180 + 20

∴ 4x = 200

→ Divide both sides by 4 to find x

∴ x = 50

∴ The value of x is 50

To find the measures of the 3 angles substitute x by 50 in their expressions

∵ The measure of one angle is x

∴ The measure of the 1st angle is 50°

∵ The measure of the 2nd angle is 2x

∴ The measure of the 2nd angle = 2(50)

∴ The measure of the 2nd angle is 100°

∵ The measure of the 3rd angle is (x - 20)

∴ The measure of the 3rd angle = (50 - 20)

∴ The measure of the 3rd angle is 30°

∴ The measures of the 3 angles are 50°, 100°, 30°

6 0
3 years ago
Need to find a and b
svp [43]
First, 126/32 so divide top and bottom by 2

126 / 2 = 63
32/2 = 16

answer
 
a = 16
and
b = 2


5 0
3 years ago
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