4(4−6x)^2 −2(4−6x)=12−x
(4-6x)•(4(4-6x)-2)=12-x 56-96x-84x+144x^2=12-x 56-180x+144x^2=12-x 144x^2-179x+44=0 X1=179+√6697\288 X2=179-√6697\288