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NARA [144]
3 years ago
10

decide which part of the quadratic formula tells you whether the quadratic equation can be solved by factoring. −b b2 − 4ac 2a u

se the part of the quadratic formula that you chose above and find its value, given the following quadratic equation: 2x2 7x 3 = 0
Mathematics
2 answers:
Romashka [77]3 years ago
4 0

Answer:

Step-by-step explanation:

A quadratic equation can be factorised if and only if there are rational roots.

For any quadratic equation the discriminant decides about the nature of roots.

Thus only if the discriminant is a perfect square we can have rational roots and in this case only factorization is possible.

In the given equation

2x^2+ 7x+ 3 = 0\\a=2, b=7, c=3\\b^2-4ac = 1

Since 1 is a perfect square we can factor and solve

2x^2 +7x +3 = 0\\(2x+1)(x+3)=0\\x=-1/2 or x = -3

Neko [114]3 years ago
3 0
If b^2 - 4ac is a perfect square, then the equation can be solved by factoring.

2x^2 + 7x + 3 = 0

a = 2, b = 7, c = 3

b^2 - 4ac = 7^2 - (4 x 2 x 3) = 49 - 24 = 25
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A line has a slope of 2. Write an equation in slope intercept form for the line that is perpendicular to this line.
notsponge [240]

Hey there!

A perpendicular line's slope to another line is always the negative reciprocal of slope.

If our line has a slope of two, we first must find the reciprocal, which is 1/2. Then, we put a negative on it.

Therefore, our equation is y=-1/2x+b.

I hope that this helps! Have a great day!

6 0
3 years ago
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Fine the value of the x in the triangle shown below.
Sever21 [200]

Answer:

x=28

Step-by-step explanation:

The interior angles of a triangle must add to 180 degrees

Therefore,

79+73+x=180

Combine like terms by adding 79 and 73

152+x=180

To solve for x, get x by itself. Since 152 is being added to x, subtract 152 from both sides. This will cancel the 152, and leave x by itself.

152-152+x=180-152

x=28

So, x is equal to 28 degrees

8 0
3 years ago
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What is the solution to the equation sqrt n= sqrt 3n-3 +1?​
inna [77]
The answer would be n = 1
3 0
4 years ago
Kendell made 2/5 of a necklace in 1/9 of an hour. How many necklacws can she make in one hour?
Ivahew [28]

Answer:

18/5 or 36 necklace

Step-by-step explanation:

kendell made 2/5 necklace in 1/9 hours

how many will she make in 1 hour

hmmm?

2/5 = 1/9

x = 1

2/5 × 1 = 1/9x

x = 2/5 ÷ 1/9

x = 2/5 × 9/1

x = 18/5

x = 3.6necklace

4 0
2 years ago
Pls help me !!!!!!!!!!!!!!!!!!!!!!!!
Vikentia [17]

Answer:

9.89 m

Step-by-step explanation:

AC is the hypotenuse (H)

x is the opposite (O)

O and H are in sine

sin=O/H

H=O/sin

H=7.9/sin(53)

=9.89187169943418

3 SF

9.89 m

8 0
3 years ago
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