Question

responda:
a)4x2 - 27 = x2


b)8x2 = 60-7x2


c)3(x2 - 1)= x2 +7


d)2(x2 - 1)=x2 +7


e)5(x2 - 1)= 4(x2+1)



f)(x - 3)(x + 4) + 8 = x

Answer 1

a) 4x2-27=x2
    -2x=-4x-8+27
   -x2=+8+27
   -x2=35/-x2
  x= -17,5