anonymous
  • anonymous
can someone solve this?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
y = 4x^2 − 7x + 2
lgbasallote
  • lgbasallote
go callisto! :DDD
anonymous
  • anonymous
what?

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More answers

Directrix
  • Directrix
Try the Quadratic Formula. I don't think this one will factor over the set of rationals.
Callisto
  • Callisto
all values lying on the line of the curve y = 4x^2 − 7x + 2
Callisto
  • Callisto
I think y=0 if you need to solve it?
Directrix
  • Directrix
What are the instructions for this problem?
lgbasallote
  • lgbasallote
^that's what go callisto meant @katlin95
anonymous
  • anonymous
i just need to solve it, it was posted up in the discussion area for my schooling
anonymous
  • anonymous
i knw igbasallote
Callisto
  • Callisto
Well, i assume if you need to solve it, put y=0 0 = 4x^2 − 7x + 2 Use the quadratic formula: \[x = (-b \pm \sqrt{b^2-4ac})/(2a)\] Put a=4 , b=-7, and c=2 into the formula and solve for x :)
anonymous
  • anonymous
wow!
Callisto
  • Callisto
can you solve it?
Directrix
  • Directrix
x = (7 +/- Square root of 17)/ 8
.Sam.
  • .Sam.
\[\text{Solve this by completing the square}\]
.Sam.
  • .Sam.
\[\begin{array}{l} \text{$$$ $}\text{divide both sides by }4: \\ x^2-\frac{7 x}{4}+\frac{1}{2}=0 \\ \text{Subtract }\frac{1}{2}\text{ from both sides:} \\ x^2-\frac{7 x}{4}=-\frac{1}{2} \\ \text{Add }\frac{49}{64}\text{ to both sides:} \\ x^2-\frac{7 x}{4}+\frac{49}{64}=\frac{17}{64} \\ \text{factor the left hand side:} \\ \left(x-\frac{7}{8}\right)^2=\frac{17}{64} \\ \text{take the square root of both sides} \\ \left|x-\frac{7}{8}\right|=\frac{\sqrt{17}}{8} \\ \text{eliminate the absolute value} \\ x-\frac{7}{8}=-\frac{\sqrt{17}}{8}\text{ and }x-\frac{7}{8}=\frac{\sqrt{17}}{8} \\ \text{add }\frac{7}{8}\text{ to both sides} \\ x=\frac{1}{8} \left(7-\sqrt{17}\right)\text{ adn }x=\frac{1}{8} \left(7+\sqrt{17}\right) \\\end{array}\]
anonymous
  • anonymous
wow.. thankyou so much!!!!! yer da bomb man!

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