solve given quadratic equation by completing square method: 5(x2) +4x-7=0
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Answer:
Step-by-step explanation:
5x² = 4x + 7
∴[ multiply by "5"]
25x² - 20x - 35 = 0
(5x)² - 2(5x)(2) + 2² - 2² - 35 = 0
(5x - 2)² = 39
5x - 2 = +-√39
5x = +-√39 + 2
x = (√39 + 2)/5
Or,
x = (-√39 + 2)/5
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