Question

factorize by splitting the middle term
20x^2-x-1​

Answer 1

Step-by-step explanation:

$20x {}^{2} - x - 1 \\ = 20 {x}^{2} - 5x + 4x - 1 \\ = 5x(4x - 1) + 1(4x - 1) \\ = (4x - 1)(5x + 1)$

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Answer 2

${20x}^{2} - x - 1$

${20x}^{2} - 5x + 4x - 1$

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

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

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