Question

x²=7x-12 alguém sabe????

Answer 1

$x^2-7x+12=0 \\ \Delta=7^2-4\times1\times12\\ \Delta=9\\ x= \frac{+7+- \sqrt{9} }{2\times1} \\ x'= \frac{7+3}{2}=5\\ x"= \frac{7-3}{2}=2$