Whakaoti mō b
b=-1
Tohaina
Kua tāruatia ki te papatopenga
3-2b+4=2-7b
Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te b-2.
7-2b=2-7b
Tāpirihia te 3 ki te 4, ka 7.
7-2b+7b=2
Me tāpiri te 7b ki ngā taha e rua.
7+5b=2
Pahekotia te -2b me 7b, ka 5b.
5b=2-7
Tangohia te 7 mai i ngā taha e rua.
5b=-5
Tangohia te 7 i te 2, ka -5.
b=\frac{-5}{5}
Whakawehea ngā taha e rua ki te 5.
b=-1
Whakawehea te -5 ki te 5, kia riro ko -1.
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}