Question

9x2 - (7x -2)(x + 3)= -12 +11

Answer 1

$9x^2-(7x-2)(x+3)=-12+11\9x^2-7x^2+2x-21x+6=-1\2x^2-19x+7=0\D=361-56=305\x={19pmsqrt{305}over4}$