3 years ago

How do I solve quadratic using the quadratic formula

Mathematics

2 answers:

tino4ka555 [31]3 years ago

7 0

What he said is correct i made sure.

Irina18 [472]3 years ago

3 0

for example if you have 3x^2+2x-1 then a=3 b=2 and c=-1 you plug those into the formula and solve to get the formula just look it up and go to images

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Neko [114]

The figure has 5 sides, so it must be a pentagon. Pentagon’s interior angles sum up to 540°.

Therefore:

132+90+3x=540

222+3x=540

3x=318

x=106

Checking work, where x=106

222+3(106)=540.

So x°=106°

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2 years ago

The airplane in the scale drawing has a wingspan of a feet and a tailspan of b feet. if the tailspan in the drawing is 2 inches,

Elena L [17]

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3 years ago

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You have 5/6 cup of cocoa in your cupboard. A recipe for cookies calls for 2/5 cup of cocoa. How much cocoa would you have left

bixtya [17]

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3 years ago

I need help with this

DochEvi [55]

Answer: B. 8 x 10^3

Step-by-step explanation:

4 0

3 years ago

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Find the solutions of the quadratic equation -9c² +2 +3 = 0.

Tresset [83]

Given that,

An equation : -9c² +2c +3 = 0

To find,

Find the value of x.

Solution,

We have, -9c² +2c +3 = 0

We can solve it using the formula as follows :

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

Here, a = -9, b = 2 and c =3

Put the values,

$c=\dfrac{-2\pm \sqrt{(2)^2-4(-9)(3)}}{2(-9)}\\\\c=\dfrac{-2+\sqrt{(2)^{2}-4(-9)(3)}}{2(-9)}, \dfrac{-2-\sqrt{(2)^{2}-4(-9)(3)}}{2(-9)}\\\\c=-0.47, 0.69$

So, the solution are -0.47 and 0.69.

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3 years ago