Whakaoti mō b
b=-4
Tohaina
Kua tāruatia ki te papatopenga
1+2b-4b=9
Tangohia te 4b mai i ngā taha e rua.
1-2b=9
Pahekotia te 2b me -4b, ka -2b.
-2b=9-1
Tangohia te 1 mai i ngā taha e rua.
-2b=8
Tangohia te 1 i te 9, ka 8.
b=\frac{8}{-2}
Whakawehea ngā taha e rua ki te -2.
b=-4
Whakawehea te 8 ki te -2, kia riro ko -4.
Ngā Tauira
whārite tapawhā
{ x } ^ { 2 } - 4 x - 5 = 0
Āhuahanga
4 \sin \theta \cos \theta = 2 \sin \theta
whārite paerangi
y = 3x + 4
Arithmetic
699 * 533
Poukapa
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
whārite Simultaneous
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Whakarerekētanga
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Whakaurunga
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Ngā Tepe
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}