Question

resolva a equaçao 4X²+9=12X

Answer 1

4x² +9 -12x = 0
∆ = 0
Bhaskara = x' = 3/2
x" = 3/2

Espero ter ajudado!!

Answer 2

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




OBS: Essa equação tem solução única, pois $\Delta=0$