Question

Actividades Resuelva el (7x² + 9 x e siguient​

Answer 1

Respuesta:

7X

2

−16X+9=0

Primera X

\frac{-\left(-16\right)+\sqrt{\left(-16\right)^2-4\cdot \:7\cdot \:9}}{2\cdot \:7}

2⋅7

−(−16)+

(−16)

2

−4⋅7⋅9

=\frac{16+\sqrt{\left(-16\right)^2-4\cdot \:7\cdot \:9}}{2\cdot \:7}=

2⋅7

16+

(−16)

2

−4⋅7⋅9

=\frac{16+\sqrt{4}}{2\cdot \:7}=

2⋅7

16+

4

=\frac{16+\sqrt{4}}{14}=\frac{16+2}{14}=\frac{18}{14}=\frac{9}{7}=

14

16+

4

=

14

16+2

=

14

18

=

7

9