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hatemath
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hi my name is pj and i need help with this problem? solve the quadratic equation x2+6x+8=0
 3 years ago
 3 years ago
hatemath Group Title
hi my name is pj and i need help with this problem? solve the quadratic equation x2+6x+8=0
 3 years ago
 3 years ago

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polpak Group TitleBest ResponseYou've already chosen the best response.0
You can either factor it, or use the quadratic equation
 3 years ago

polpak Group TitleBest ResponseYou've already chosen the best response.0
Which do you want to do?
 3 years ago

aama100 Group TitleBest ResponseYou've already chosen the best response.0
x = 1/6 (8  x2)
 3 years ago

aama100 Group TitleBest ResponseYou've already chosen the best response.0
{{x = 4}, {x = 2}} ignore my fist post
 3 years ago

hatemath Group TitleBest ResponseYou've already chosen the best response.0
how do i factor it?
 3 years ago

polpak Group TitleBest ResponseYou've already chosen the best response.0
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).
 3 years ago

polpak Group TitleBest ResponseYou've already chosen the best response.0
So what two numbers add to make 6 and multiply to be 8 ?
 3 years ago

polpak Group TitleBest ResponseYou've already chosen the best response.0
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. \((x+4)(x+2) = 0 \implies x= 4 \text{ or } x = 2\)
 3 years ago

hatemath Group TitleBest ResponseYou've already chosen the best response.0
(x+6)(x8)=0 is that x2+6x8=0?
 3 years ago
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