angelahale09 angelahale09

01-05-2018
Mathematics

contestada

Find the sum and product of the roots. 3x^
2 - 4x - 7 = 0

Respuesta :

CastleRook CastleRook

10-05-2018

Given the quadratic function, to get the roots we factorize:
3x²-4x-7=0

3x²+3x-7x-7=0
3x(x+1)-7(x+1)=0
(3x-7)(x+1)=0
thus the roots are
x=-1 or x=3/7
thus the sum of the roots will be:
-1+3/7
=-4/7

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