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

2 Answers

5 votes

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

User Hussein Abdallah
by
7.6k points
4 votes

Explanation:


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

User Viorel
by
8.6k points

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