𝑥^2 − 2√2𝑥 − 30
We can further write it as
= 𝑥^2 − 5√2𝑥 + 3√2𝑥 − 30
By taking out the common terms
= x (x -5√2) + 3√2 (x -5√2)
So we get,
= (x +3√2) (x -5√2)
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