" A matemática é o alfabeto com que Deus escreveu o universo". Galileu Galilei
EE2519.R: b2−4(1)(9)=0 =b2−36=0 =b2=36 =b=+V36 =b=6∨b=−6 17.R:=(−1,6)15.R:=(−1,7)
19-R:x^2 + bx + 9 = 0 (=) b^2 -4 (a)(c)(=) b^2 -4 (1)(9)(=) b^2 -36 = 0 (=) b^2 = 36 (=) b = V36(=) b = 6
EE25
ResponderEliminar19.R: b2−4(1)(9)=0
=b2−36=0
=b2=36
=b=+V36
=b=6∨b=−6
17.R:=(−1,6)
15.R:=(−1,7)
19-R:
ResponderEliminarx^2 + bx + 9 = 0
(=) b^2 -4 (a)(c)
(=) b^2 -4 (1)(9)
(=) b^2 -36 = 0
(=) b^2 = 36
(=) b = V36
(=) b = 6