Question

Find the soltion set 8x^2+7x-1=0

Answer 1

Answer: (1/8, 1)

x = 1/8. x= 1

Explanation:

Factor the equation 8x^2 +7x -1=0

(8x - 1)(x +1)

Set each factor equal to zero and solve for x.

8x-1=0 8x = 1 x = 1/8

x -1= 0 x= 1

Answer 2

Explanation:

`del = 49 - (4 * 8 * (- 1)) = 81 \\ x 1=( 7 + √(81) ) / (2 * 8) = 1 \\ x2 = (- 7 + √(81) ) / (2 * 8) = 0.125 \\`