Question

equação x²-x-12=0 {-3;4}

Answer 1

a=1 b=-1 c=-12 Delta= b^2-4.a.c Delta= (-1)^2 - 4.1.(-12) Delta= 1+48 Delta= 49 x= -b+- raiz de Delta/2.a x= -(-1)+-7/2 x1= 1-7/2 => -6/2 => -3 x2= 1+7/2 => 8/2 => 4