Tresag
use the quadratic formula to find any x-intercepts on the graph of the equation.
y=x^2+2x-10
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sasogeek
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what is the quadratic formula?
Tresag
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I don't know
Tresag
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ax^2+bx+c=0 ?
sasogeek
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nope :P
well the quadratic formula states that
\(\huge x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \)
sasogeek
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can you continue now that you have the formula?
Tresag
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no
sasogeek
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ok so if you have \(\huge ax^2+bx+c=0 \)
substitute the values of a b and c into the formula and solve it.
sasogeek
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are we okay now?
Yahoo!
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To find x-intercepts put y =0 in y=x^2+2x-10
Tresag
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no
Yahoo!
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nw it is a quad eq....use Quadratic Formula..
Tresag
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ok how do I do that ?
sasogeek
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you have an equation similar to ax^2+bx+c=0
substitute the values into the quadratic formula i gave you, and solve it algebraically
Tresag
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I don not know how to do that ???????
sasogeek
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a=1
b=2
c=-10
replace that into the equation that into the formula
sasogeek
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how are we doing?
Tresag
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x^2+2x+-10=0
sasogeek
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what about it?
Tresag
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so now what do I do w/ it ?
sasogeek
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i told you what a,b, and c are in that equation.
a=1
b=2
c=-10
replace the values of a,b and c into the quadratic formula i gave you and solve it to find x
sasogeek
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which part of that don't you understand? :/