Factorize algebraic expressions: x2 – 11x – 42
We have,
x2 – 11x – 42
By considering, p+q = -11 and pq = -42
So we can replace -11x by 3x -14x
-42 by 3 × -14
x2 – 11x – 42 = x2 + 3x – 14x – 42
= x (x + 3) – 14 (x + 3)
= (x – 14) (x + 3)
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