Whakaoti mō b
b\leq 2
Tohaina
Kua tāruatia ki te papatopenga
-8b+20\geq 4
Pahekotia te -2b me -6b, ka -8b.
-8b\geq 4-20
Tangohia te 20 mai i ngā taha e rua.
-8b\geq -16
Tangohia te 20 i te 4, ka -16.
b\leq \frac{-16}{-8}
Whakawehea ngā taha e rua ki te -8. I te mea he tōraro a -8, ka huri te ahunga koreōrite.
b\leq 2
Whakawehea te -16 ki te -8, kia riro ko 2.
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}