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Inga [223]
3 years ago
10

Factor this equation 4x^2+12x-7

Mathematics
1 answer:
Levart [38]3 years ago
3 0
4x^2+12x-7=0\\\\a=4;\ b=12;\ c=-7\\\Delta=b^2-4ac\\\\\Delta=12^2-4\cdot4\cdot(-7)=144+112=256 \ \textgreater \  0\\\\therefore\\x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\\sqrt\Delta=\sqrt{256}=16\\\\x_1=\dfrac{-12-16}{2\cdot4}=\dfrac{-28}{8}=\boxed{-\dfrac{7}{2}}\\\\x_2=\dfrac{-12+16}{2\cdot4}=\dfrac{4}{8}=\boxed{\dfrac{1}{2}}
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Which statement describes a number with the smallest absolute value?
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This is because, a negative (absolute value) becomes positive

Which would lead for |-23| to end up being |23|

Anytime a negative absolute value is placed, it becomes a positive and a positive stays positive.

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4 0
3 years ago
2x + y = 3
sergejj [24]

Hey there!

First, multiply the second equation by -2 as the problem states. When you multiply the second equation by -2, you get:

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Now, add this equation to the first equation in which you simply combine like terms:

2x+y=3

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In conclusion, the correct answer would be the first choice.

4 0
3 years ago
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nataly862011 [7]
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3 0
3 years ago
I can do your homework for you
marshall27 [118]

Answer:

thanks for the free points

Step-by-step explanation:

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Llana [10]

Hello!

The Question asked is simpler then you may expect! All you need to do is multiply the two numbers by 1.07 to find the answer which is,

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<h3>Hope this helps!</h3>
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