Question

por favor me ajude nessa equaçao 4x2-12+9=0

Answer 1

$4 x^{2} -12+9=0\\\\ a=4;b=-12;c=9\\\\\\ \Delta=b^2-4ac\to \Delta=(-12)^2-4*4*9\to \Delta=144-144\to \Delta=0\\\\\\ x'=x''\\\\\\ x= \frac{-b\pm \sqrt{\Delta} }{2a} \to x= \frac{-(-12)\pm \sqrt{0} }{2*4} \to x= \frac{12\pm 0 }{8} \to \\\\\\ x'=x''= \frac{12}{8} \to x'=x''= \frac{3}{2} \\\\\\\\ S=( \frac{3}{2} )$