Question

resolva a equação do 2 grau; m² +7m+12=0 ?

Answer 1

m² +7m +12=0

a=1
b=7
c=12

Δ=b²-4ac
Δ=7²-4(12)
Δ=49-48
Δ=1
√Δ=√1 = ± 1

$x=- \frac{b\pm \sqrt{\triangle} }{2a} = \frac{-7\pm1}{2} \\ \\ x'= \frac{-7+1}{2} =- \frac{6}{2} =-3 \\ \\ x"= \frac{-7-1}{2} =- \frac{8}{2} =-4$

raízes são (-4,-3)