Question

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x²-25=0
formula general
2x²+7x+3=0

Answer 1

1)

x² - 25 = 0
x² = 25
x = ± √25
x = ± 5

2)

2x² + 7x + 3 = 0

fórmula general:  Si ax² + bx + c = 0, entonces:

x = (1/(2a))(-b ± √(b² - 4ac)

entonces:

x = (1/(2*2))(-7±√(7² - 4(2)(3)))
x = (1/4)(-7±√25)
x = (1/4)(-7 ± 5)

x1 = (1/4)(-7-5)
x1 = -3

x2 = (1/4)(-7+5)
x2 = -1/2

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