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3 years ago

27x to second power-42x+12 if x=2

Mathematics

1 answer:

Rasek [7]3 years ago

3 0

27x^2 - 42x + 12

If x = 2:

27(2)^2 - 42(2) + 12

= 27(4) - 84 + 12

= 108 - 72

= 36

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Carlos is using the quadratic formula to find the solutions of y=3x^2-5x-2. Which of the following will simplify to the correct

Nana76 [90]

Answer:

$Fx=\frac{5\pm\sqrt{25+24} }{6}$

Step-by-step explanation:

A quadratic equation in one variable given by the general expression:

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The roots of this equation can be found using the quadratic formula, which is given by:

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As you can see, in this case:

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Using the quadratic formula:

$x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}=\frac{-(-5)\pm\sqrt{(-5)^2-4(3)(-2)} }{2(3)}=\frac{5\pm\sqrt{25+24} }{6}$

Therefore, the answer is:

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3 years ago