3 years ago

3MIN LEFT PLEASE HELP ME FAST

Mathematics

1 answer:

Lapatulllka [165]3 years ago

5 0

226

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Which equation shows the quadratic formula used correctly to solve 5x2 + 3x – 4 = 0 for x?

vovikov84 [41]

Answer:

$x=\frac{-3\pm\sqrt{(3)^2-4(5)(-4)}}{2(5)}$

Therefore, Option 1 is correct.

Step-by-step explanation:

We have been given the quadratic equation:

$5x^2+3x-4=0$

If we compare it will general quadratic equation which is: $ax^2+bx+c=0$

Here, a=5,b=3 and c= -4.

Now, we will use the formula:

And then $x=\frac{-b\pm\sqrt{D}}{2a}$

Where, $D=b^2-4ac$

$x=\frac{-3\pm\sqrt{(3)^2-4(5)(-4)}}{2(5)}$

Therefore, Option 1 is correct.

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Answer: i think its c

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Whats the answer for this? question? D:

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-1 because x is 4 so you just plug it in and 4-8 is -4 and -4/4 is -1.

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Answer:

The correct answer is 54 units

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