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hatemath
 4 years ago
hi my name is pj and i need help with this problem? solve the quadratic equation x2+6x+8=0
hatemath
 4 years ago
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
 4 years ago
Best ResponseYou've already chosen the best response.0You can either factor it, or use the quadratic equation

polpak
 4 years ago
Best ResponseYou've already chosen the best response.0Which do you want to do?

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

polpak
 4 years ago
Best ResponseYou've already chosen the best response.0You 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).

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

polpak
 4 years ago
Best ResponseYou've already chosen the best response.0Correct. 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
 4 years ago
Best ResponseYou've already chosen the best response.0(x+6)(x8)=0 is that x2+6x8=0?
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