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Home > past-papers-math > Question

Factorize: x² + 16x + 63.

0
A) (x + 7)(x + 9)
B) (x + 6)(x + 9)
C) (x + 3)(x + 4)
D) (x + 7)(x + 8)

Correct Answer: A) (x + 7)(x + 9)

SMART TRICK: Quadratic equation ax² + bx + c ko factorize karne ke liye aisay 2 numbers sochain jinhe multiply karein tou last term (63) aaye, aur add karein tou middle term (16) aaye. Tables parhain: 7 × 9 = 63, aur 7 + 9 = 16. Dono numbers positive hain. Tou seedha shortcut apply karein aur brackets mein (x + 7) aur (x + 9) likh dein. Correct Option (A) bilkul theek hai.

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