Solve for x
x\leq 3
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x^{2}+8x+15\geq \left(x+9\right)\left(x+1\right)
Use the distributive property to multiply x+5 by x+3 and combine like terms.
x^{2}+8x+15\geq x^{2}+10x+9
Use the distributive property to multiply x+9 by x+1 and combine like terms.
x^{2}+8x+15-x^{2}\geq 10x+9
Subtract x^{2} from both sides.
8x+15\geq 10x+9
Combine x^{2} and -x^{2} to get 0.
8x+15-10x\geq 9
Subtract 10x from both sides.
-2x+15\geq 9
Combine 8x and -10x to get -2x.
-2x\geq 9-15
Subtract 15 from both sides.
-2x\geq -6
Subtract 15 from 9 to get -6.
x\leq \frac{-6}{-2}
Divide both sides by -2. Since -2 is negative, the inequality direction is changed.
x\leq 3
Divide -6 by -2 to get 3.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\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]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}