Mathematics
scaryman74
15

Solve 3x2 + 4x = 2. TEACH me how to solve this.. I know what to do once I have it in the right forum... but I do not understand how to simplify it down. a. quantity of 2 plus or minus square root of 10 all over 6 b. quantity of negative 2 plus or minus 2 square root of 10 all over 3 c. quantity of negative 2 plus or minus square root of 10 all over 3 d. quantity of 4 plus or minus square root of 10 all over 3

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(1) Answers
Yaree

so there is this quadratic of 3x^2 +4x = 2 add to both sides (- 2 ) and will get  3x^2 +4x -2 = 0 so calcule the discriminante  D = b^2 +4ac where b = 4,a = 3 and c = -2 D = 16 - 4*3*(-2) = 16 +24 = 40 x_1,2 = (-b +/ - sqrt(D))/2a x_1,2 = (-4 +/- sqrt40)/6 = (-4+/- 2sqrt10)/6 = 2(-2+/-sqrt10)/6 =  = (-2+/-sqrt10)/3 x_1,2 = (-2+/-sqrt10)/3 so this mean that choice c. is right sure  hope this will be understandably sure right easy for you 

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