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RD Chapter 8 Quadratic Equations Ex 8.3 Solutions

Question - 1 : - Solve the following quadratic equations by factorization.
(x – 4) (x + 2) = 0

Answer - 1 : -

(x – 4) (x + 2) = 0
Either x – 4 = 0, then x = 4
or x + 2, = 0, then x = -2
Roots are x = 4, -2

Question - 2 : - (2x + 3) (3x – 7) = 0

Answer - 2 : -


Question - 3 : - 3x2 – 14x – 5 = 0 (C.B.S.E. 1999C)

Answer - 3 : -


Roots are x = 5, −13

Question - 4 : - 9x2 – 3x – 2 = 0

Answer - 4 : -


Question - 5 : -

Answer - 5 : -


Question - 6 : - 6x2 + 11x + 3 = 0

Answer - 6 : -


Question - 7 : - 5x2 – 3x – 2 = 0

Answer - 7 : -


Question - 8 : - 48x2 – 13x – 1 =0

Answer - 8 : -


Roots are x = 1/3 , −1/16

Question - 9 : - 3x2 = – 11x – 10

Answer - 9 : -


Question - 10 : - 25x (x + 1) = -4

Answer - 10 : -


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