Question

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Answer 1

Answer:

Hello dear...

$x + 3 {x}^{2} - 1 \\ = x(3x + 1) - 1 \\ = (x - 1)(3x + 1) \\ sox = 1or \: \frac{ - 1}{3}$

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Answer 2

Answer:

X=1,-3

Step-by-step explanation:

x²+3x-1

x(x+3)-1

(x-1)(x+3)

x=1,-3

Hope it helps