1.

Solve: x2 - 4x - 3

Answer»

x2 − 4x − 3 = 0

⇒ x2 − 4x + 4 − 7 = 0

⇒ (x−2)2 − 7 = 0

⇒ (x−2)2 = 7

∴ x − 2 = −√7​, +√7​

x = 2 − √7​, 2 + √7​



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