Expand
28a^{2}+9a-4
Evaluate
\left(4a-1\right)\left(7a+4\right)
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28a^{2}+16a-7a-4
Apply the distributive property by multiplying each term of 4a-1 by each term of 7a+4.
28a^{2}+9a-4
Combine 16a and -7a to get 9a.
28a^{2}+16a-7a-4
Apply the distributive property by multiplying each term of 4a-1 by each term of 7a+4.
28a^{2}+9a-4
Combine 16a and -7a to get 9a.
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{ x } ^ { 2 } - 4 x - 5 = 0
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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