some.random.cool.kid
  • some.random.cool.kid
Solve x2 − 5x + 1 = 0 using the quadratic formula.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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some.random.cool.kid
  • some.random.cool.kid
step one is to -1 by both sides?
Nnesha
  • Nnesha
now just use the quadraitc formula
Nnesha
  • Nnesha
no**

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Nnesha
  • Nnesha
you already know the formula so just plugin a ,b ,c values
some.random.cool.kid
  • some.random.cool.kid
yeah but first -1 to the 1 and 0 go first dont they i have to simplify them.
Michele_Laino
  • Michele_Laino
comparing your equation with the general quadratic equation: \[a{x^2} + bx + c = 0\] we get: a=1, b=-5, and c=1 now, please apply this formula: \[x = \frac{{ - b \pm \sqrt {{b^2} - 4 \times a \times c} }}{{2 \times a}}\]
Nnesha
  • Nnesha
no quadratic equation should be in standard form \[\huge\rm Ax^2+Bx+C=0\] equal to zero
Nnesha
  • Nnesha
that was for completing the square method but when we use quadratic formula we ned `standard form`
some.random.cool.kid
  • some.random.cool.kid
ok
some.random.cool.kid
  • some.random.cool.kid
so what is the standard is it like ... idk actually
Nnesha
  • Nnesha
\(\color{blue}{\text{Originally Posted by}}\) @Nnesha no quadratic equation should be in standard form \[\huge\rm Ax^2+Bx+C=0\] equal to zero \(\color{blue}{\text{End of Quote}}\) ^^that's the standard form
Nnesha
  • Nnesha
where a=leading coefficient b=middle term c=constant term
Nnesha
  • Nnesha
now just plugin a ,b, c values into the quadratic formula
some.random.cool.kid
  • some.random.cool.kid
ok
some.random.cool.kid
  • some.random.cool.kid
writing all these down just in case your wondering... very helpful info for big exam EOC..
Nnesha
  • Nnesha
that's Awesome take ur time write theses down and practice as much as u can
some.random.cool.kid
  • some.random.cool.kid
k so what do i next because i wasn't sure...
Nnesha
  • Nnesha
did you substitute a ,b c for their values ?
some.random.cool.kid
  • some.random.cool.kid
a is x^2 right ?
some.random.cool.kid
  • some.random.cool.kid
and b is 5x?
Nnesha
  • Nnesha
no just the coefficient not the variable
Nnesha
  • Nnesha
look at the Michele'z comment a=1 bec x^2 is same as 1x^2
some.random.cool.kid
  • some.random.cool.kid
so 5 since its not a variable?
some.random.cool.kid
  • some.random.cool.kid
/so your saying 1^2? i dont get how thats possible...
Nnesha
  • Nnesha
yes 5 is b
Nnesha
  • Nnesha
there is invisible one at front of x^2 x^2 is same as 1x^2 so leading coefficient is one
Nnesha
  • Nnesha
i'm not saying x =1 leading coefficient is one
Nnesha
  • Nnesha
\[\huge\rm \color{red}{1}x^2+\color{blue}{5}x+\color{green}{1}=0\] \[\huge\rm \color{ReD}{A}x^2+\color{blue}{B}x+\color{green}{C}=0\]
some.random.cool.kid
  • some.random.cool.kid
alright
Nnesha
  • Nnesha
oky now just plugin
some.random.cool.kid
  • some.random.cool.kid
k thanks i gtg thanks for your help. :D

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