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anonymous
 one year ago
I will medal! Please help!
Solve 8x2 + 7x  15 =  7.
anonymous
 one year ago
I will medal! Please help! Solve 8x2 + 7x  15 =  7.

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Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1set it equal to zero move 7 to the left side

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1add 7 both sides \[ \huge\rm 8x^2 + 7x  15\color{reD}{+7} =  7\color{reD}{+7}\]\[ \large\rm 8x^2 + 7x \color{reD}{ 8} = 0\] now you can use quadratic formula to solve for x \[\huge\rm \frac{ { }b \pm \sqrt{b^2 4ac} }{ {2a} }\] quadratic formula where abc values are \[\large\rm Ax^2 +Bx+C=0\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1\[ \large\rm \color{red}{8}x^2 +\color{Red}{ 7}x \color{reD}{ 8} = 0\]\[\large\rm \color{blue}{A}x^2 +\color{blue}{B}x+\color{blue}{C}=0\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1or ofc you can factor it
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