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anonymous
 3 years ago
Use the quadratic formula to solve 4y^2 + 8y + 7 = 4
anonymous
 3 years ago
Use the quadratic formula to solve 4y^2 + 8y + 7 = 4

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SolomonZelman
 3 years ago
Best ResponseYou've already chosen the best response.0\[4y^2+8y+7=4\]\[4y^2+8y+7\color{red} { 4 } =4\color{red} { 4 }\]\[4y^2+8y+3=0\]look for the a b c and plug them into the quadratic formula.\[\color{blue} { 4 }y^2+\color{blue} { 8 }y+\color{blue} { 3 }=0\]\[\color{green} { a=4 ~~~~~~~ }\color{green} { b=8 ~~~~~~~ }\color{green} { c=3 ~~~~~~~ }\]

SolomonZelman
 3 years ago
Best ResponseYou've already chosen the best response.0\[\huge\color{red}{ \frac{\huge\color{blue}{ 8 } ±\sqrt{\huge\color{blue}{ 8 } ^2(4 \times \huge\color{blue}{ 4 } \times \huge\color{blue}{ 7 } )}}{2 \times \huge\color{blue}{ 4} }}\]

SolomonZelman
 3 years ago
Best ResponseYou've already chosen the best response.0\[\huge\color{goldenrod}{ \frac{8±\sqrt{48}}{8} }\]

SolomonZelman
 3 years ago
Best ResponseYou've already chosen the best response.0if you haven't learned about imaginary number (I am talking about "i") then simply say no solution. Now, if you have lets go on... \[\huge\color{goldenrod}{ \frac{8±4i \sqrt{3}}{8} }\] and divide top and bottom by 4, \[\huge\color{cornflowerblue}{ \frac{2±i \sqrt{3}}{2} }\]
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