Question

$x2 + 22x + 85$
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Answer 1

x^2 + 22x + 85

=> x^2 + 17x + 5x + 85        (splitting middle term)

=> (x^2 + 17x) + (5x + 85)

=> x(x+17) + 5(x + 17)      (taking common out)

=> (x+5) (x+17) are the factors