How do you expand and simplify $3(2x-1)(5x+4)$ ?

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Answer 1 · 2016-06-19T03:42:39

$3(2x-1)(5x+4)=30x^2+9x-12$

$3(2x-1)(5x+4)$

= $(3xx2x-3xx1)(5x+4)$

= $(6x-3)(5x+4)$

= $6x(5x+4)-3(5x+4)$

= $6x xx5x+6x xx4-3xx5x-3xx4$

= $30x^2+24x-15x-12$

= $30x^2+9x-12$

How do you expand and simplify 3(2x-1)(5x+4)3(2x-1)(5x+4)?