How do you factor $2x^2 - 5x - 3$ ?

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Answer 1 · 2016-05-21T08:17:30

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

Multiply a and c. Find two numbers that add to b and multiply to ac

$2 * -3 = -6$

$-6 + 1 = -5$
$-6 *1 = -6$

Re-write equation with these numbers
$2x^2 -6x +x -3$

Factorise that equation
$2x(x-3) +1(x-3)$

Therefore the answer is;

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

How do you factor 2x^2 - 5x - 3 2x^2 - 5x - 3?