Question
Factorise the following by splitting the middle term:$3x^2 + 19x - 14$
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Answer
$3x^2 + 19x - 14$
$= 3x^2 + 21x - 2x - 14$
$= 3x(x + 7) - 2(x + 7)$
$= (x + 7)(3x - 2).$
$= 3x^2 + 21x - 2x - 14$
$= 3x(x + 7) - 2(x + 7)$
$= (x + 7)(3x - 2).$
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