Question

find the roots of each of the following equation by quadric formula​

Answer 1

15x^2 -28 = x

15x^2 - x - 28 =0

Discriminant = b^2 - 4ac

= (1)^2 + 4 × 15 × 28

= 1 + 60 × 28

= 1 + 1680

= 1681 = root 1681 = 41

Now x = (1 + 41 )/ 30 = 42 /30 = 7/5

Or = -40 / 30 = -4/3

Answer 2

See The Above attachment.❤☺

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