tàu bay: plane, tàu ngầm: submarine tàu điện:metro

tàu điện ngầm :the subway, tàu thủy : ship

\(5^{11}\left(5\cdot7-10\right)=5^{11}\left(35-10\right)=5^{11}\cdot5^2=5^{13}\)

em viết lại công thức dược không?

\(4x\left(x-2\right)-5\left(x-2\right)=\left(4x-5\right)\left(x-2\right)=0\)

=> \(\left[{}\begin{matrix}4x-5=0\\x-2=0\end{matrix}\right.\left[{}\begin{matrix}x=\dfrac{5}{4}\\x=2\end{matrix}\right.\)

a) \(9\left(a+b\right)^2-\left(a+b\right)=\left(a+b\right)\cdot9\cdot\left(a+b-1\right)\)

b)\(\left(mx+my\right)+\left(3x+3y\right)=m\left(x+y\right)+3\left(x+y\right)=\left(m+3\right)\left(x+y\right)\)

c) \(\left(12xy-6x\right)-\left(2y-1\right)=6x\left(2y-1\right)-\left(2y-1\right)=\left(6x-1\right)\left(2y-1\right)\)

d) \(\left(7xy^2-5x^2y\right)+\left(5x-7y\right)=xy\left(7y-5x\right)+\left(5x-7y\right)=xy\left(7y-5x\right)-\left(7y-5x\right)=\left(xy-1\right)\left(7y-5x\right)\)