Toán Lớp 8: (9x^2 – 25x^2) : (3x – 5y)
giúp mikkkkk!!!!
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Toán Lớp 8: (9x^2 – 25x^2) : (3x – 5y)
giúp mikkkkk!!!!
Comments ( 1 )
{(9{x^2} – 25{y^2}):(3x – 5y)}\\
{ = \left[ {{{\left( {3x} \right)}^2} – {{\left( {5y} \right)}^2}} \right]:\left( {3x – 5y} \right)}\\
{ = \left( {3x – 5y} \right)\left( {3x + 5x} \right):\left( {3x – 5y} \right)}\\
{ = 3x + 5x}
\end{array}\]