Question

(x-10) (x+12) चा विस्तार पुढील पैकी कोणता? 1 गुण x²+2x-120 x²-2x-120 x²+2x+120 x²-2x+120

Answer 1

Answer:

Explanation:

i) (x + 1)2 = 2(x – 3)              We have:              (x + 1)2 = 2 (x – 3) x2 + 2x + 1 = 2x – 6              ⇒ x2 + 2x + 1 – 2x + 6 = 0              ⇒ x2 + 70              Since x2 + 7 is a quadratic polynomial              ∴ (x + 1)2 = 2(x – 3) is a quadratic equation.         (ii) x2– 2x = (–2) (3 – x)               We have:               x2 – 2x = (– 2) (3 – x)               ⇒ x2 – 2x = –6 + 2x               ⇒ x2 – 2x – 2x + 6 = 0               ⇒ x2 – 4x + 6 = 0               Since x2 – 4x + 6 is a quadratic polynomial               ∴ x2 – 2x = (–2) (3 – x) is a quadratic equation.