Q. 433.7( 3 Votes )

Using factorization, find the roots of the quadratic equation: 8x 2-22x-21= 0.

Answer :

8x 2 - 22x - 21 = 0
8x 2 + 6x - 28x - 21 = 0
2x(4x + 3) – 7(4x + 3) = 0
(2x - 7)(4x + 3) = 0

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