Question

equação de 2 grau:

m²-7m-144=0

Preciso da resolução e da resposta pfvr​

Answer 1

Resposta:

S = {-9, 16}

Explicação passo a passo:

$\Delta=b^2-4ac\\\\\Delta=(-7)^2-4.1.(-144)\\\\\Delta=49+576\\\\\Delta=625\\\\m=\frac{-b\pm\sqrt{\Delta} }{2a}\\\\m=\frac{-(-7)\pm\sqrt{625} }{2.1} \\\\m=\frac{7\pm25}{2}\\\\m=\frac{-18}{2}=-9\\ou\\m=\frac{32}{2} =16$