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Formula
Expand the expression
Factorize the expression
$\left( -a+3b \right) \left( 2a-5b \right)$
$- 2 a ^ { 2 } + 11 a b - 15 b ^ { 2 }$
Organize polynomials
$\left ( \color{#FF6800}{ - } \color{#FF6800}{ a } \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ b } \right ) \left ( \color{#FF6800}{ 2 } \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 5 } \color{#FF6800}{ b } \right )$
 Organize the expression with the distributive law 
$\color{#FF6800}{ - } \color{#FF6800}{ 2 } \color{#FF6800}{ a } ^ { \color{#FF6800}{ 2 } } \color{#FF6800}{ + } \color{#FF6800}{ 11 } \color{#FF6800}{ a } \color{#FF6800}{ b } \color{#FF6800}{ - } \color{#FF6800}{ 15 } \color{#FF6800}{ b } ^ { \color{#FF6800}{ 2 } }$
$- \left ( a - 3 b \right ) \left ( 2 a - 5 b \right )$
Arrange the expression in the form of factorization..
$\left ( \color{#FF6800}{ - } \color{#FF6800}{ a } \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ b } \right ) \left ( 2 a - 5 b \right )$
 Bind the expressions with the common factor $- 1$
$\color{#FF6800}{ - } \left ( \color{#FF6800}{ a } \color{#FF6800}{ - } \color{#FF6800}{ 3 } \color{#FF6800}{ b } \right ) \left ( 2 a - 5 b \right )$
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