Evaluate
\left(7-3y-4x\right)\left(4x+3y\right)
Expand
21y-9y^{2}+28x-24xy-16x^{2}
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28x+21y-\left(4x+3y\right)^{2}
Use the distributive property to multiply 4x+3y by 7.
28x+21y-\left(16x^{2}+24xy+9y^{2}\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(4x+3y\right)^{2}.
28x+21y-16x^{2}-24xy-9y^{2}
To find the opposite of 16x^{2}+24xy+9y^{2}, find the opposite of each term.
28x+21y-\left(4x+3y\right)^{2}
Use the distributive property to multiply 4x+3y by 7.
28x+21y-\left(16x^{2}+24xy+9y^{2}\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(4x+3y\right)^{2}.
28x+21y-16x^{2}-24xy-9y^{2}
To find the opposite of 16x^{2}+24xy+9y^{2}, find the opposite of each term.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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