Solve for a
a = \frac{3}{2} = 1\frac{1}{2} = 1.5
Share
Copied to clipboard
\left(4a+12\right)\left(2a-1\right)=2\left(4a^{2}+8a-3\right)
Use the distributive property to multiply 4 by a+3.
8a^{2}+20a-12=2\left(4a^{2}+8a-3\right)
Use the distributive property to multiply 4a+12 by 2a-1 and combine like terms.
8a^{2}+20a-12=8a^{2}+16a-6
Use the distributive property to multiply 2 by 4a^{2}+8a-3.
8a^{2}+20a-12-8a^{2}=16a-6
Subtract 8a^{2} from both sides.
20a-12=16a-6
Combine 8a^{2} and -8a^{2} to get 0.
20a-12-16a=-6
Subtract 16a from both sides.
4a-12=-6
Combine 20a and -16a to get 4a.
4a=-6+12
Add 12 to both sides.
4a=6
Add -6 and 12 to get 6.
a=\frac{6}{4}
Divide both sides by 4.
a=\frac{3}{2}
Reduce the fraction \frac{6}{4} to lowest terms by extracting and canceling out 2.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
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}