Asked by Emir
Solve the Following quadratic equations by completing the square.
7x(squared)+4x-13=8
7x(squared)+4x-13=8
Answers
Answered by
Steve
7x^2 + 4x - 13 = 8
multiply by 7 to get a perfect square on the 2nd-degree term:
49x^2 + 28x = 147
49x^2 + 28x + 4 = 147 + 4
(7x+2)^2 = 151
7x = -2 ± √151
x = (-2 ± √151)/7
multiply by 7 to get a perfect square on the 2nd-degree term:
49x^2 + 28x = 147
49x^2 + 28x + 4 = 147 + 4
(7x+2)^2 = 151
7x = -2 ± √151
x = (-2 ± √151)/7
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