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kakasveta [241]
3 years ago
13

Find the zeros of the function.9x^2-36=0I've gotten half way right up to9(x^2-4)=0​

Mathematics
1 answer:
Airida [17]3 years ago
7 0

Answer:

x = ±2

Step-by-step explanation:

9x^2-36=0

Using the square root property

9x^2 = 36

Divide each side by 9

x^2 = 4

Take the square root of each side

sqrt(x^2) = sqrt(4)

x = ±2

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How would I solve this?
trasher [3.6K]

You had the right idea using the Pythagorean theorem to solve for b.

Problem is for that triangle to work, the 5 and the 2√2 would have to switch places. The length of a leg cannot be larger than the length of the hypotenuse for it to truly be a right triangle.

Pythagorean theorem only works for the right triangles. Only way to "solve this problem would be to bring in complex numbers.

5² + b² = (2√2)²

25 + b² = 2²(√2)²

25 + b² = 4(2)

25 + b² = 8

b² = 8 - 25

b² = - 17

b = √-17

b= (√17i)

Then the problem with THIS is a measurement/distance cannot be negative... which goes against exactly what that complex number i is.

8 0
3 years ago
Solve each equation by completing the square 2q^2+8q=3
3241004551 [841]

Answer:

Divide by 2

q^2+4q=3/2

q^2+4q(4/2)^2=3/2+(4/2)^2

(q+4/2)^2=3/2+16/4

taking the square root of both side

√(q+4/2)^2=√(3/2+16/4)

Note that the square will cancel the square root then you will take LCM on the right hand side

q+4/2=√6+16/4

q+4/2=√22/4

q= -4/2+-√22/4

q=(-4+_√22/4)

5 0
3 years ago
Need help please! i’m stuck
lorasvet [3.4K]

Answer:

Step-by-step explanation:

stuck under the bed??

lemme jus quickly pull you back....lol

4 0
2 years ago
The length of HK¯¯¯¯¯¯ is 24 inches.
DiKsa [7]
The answer is 12 because hk crosses hl and L is right in the middle of hk which equals 24 and half 24 equals 12 
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7 0
3 years ago
Read 2 more answers
Write an equation in slope intercept form for the line with slope -4 and why intercept -1
sladkih [1.3K]

Answer:

y = -4x -1

Step-by-step explanation:

The slope intercept form of an equation is

y = mx +b where m is the slope and b is the y intercept

y = -4x -1

8 0
3 years ago
Read 2 more answers
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