1.

One root of the quadratic equation (2x-3) (x+5)=0 is -5, then the other root is

Answer»

Alpha = -5 , Beta

(2x-3) (x+5) = 0

2x2+10x-3x-15 = 0

2x2+7x-15 = 0

Therefore, a = 2, b = 7, c = -15

We know that,

Alpha * Beta = c/a

-5 * Beta = -15/2

Beta = -15/2*-5

Beta = -15/-10 i.e Beta = 15/10

Therefore, Beta = 1.5 or 3/2



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