hatemath
hi my name is pj and i need help with this problem? solve the quadratic equation x2+6x+8=0
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polpak
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You can either factor it, or use the quadratic equation
polpak
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Which do you want to do?
aama100
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x = 1/6 (-8 - x2)
aama100
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{{x = -4}, {x = -2}}
ignore my fist post
hatemath
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how do i factor it?
polpak
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You look for two numbers that add together to give you 6 (the coefficient of the middle term), and multiply to give you 8 (the last term).
hatemath
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ok
polpak
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So what two numbers add to make 6 and multiply to be 8 ?
hatemath
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2 and 4
polpak
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Correct. So we can factor \(x^2+6x+8\) into \((x+4)(x+2)\).
And if our original expression was equal to 0 then the factored form will also equal 0.
\((x+4)(x+2) = 0 \implies x= -4 \text{ or } x = -2\)
hatemath
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thank you
hatemath
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(x+6)(x-8)=0 is that x2+6x-8=0?