Question

ayuda por favor

son ejercicios de ecuaciones cuadráticas

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Answer 1

a) x² + 8x + 16 = 0

x = -8 ± √ 8² - 4 × 1 × 16 / 2×1

x = -8 ± √ 64 - 64 / 2

x = -8 ± √ 0 / 2

x = -8 / 2 = -4 doble

b) x² - 3x - 10 = 0

x = -(-3) ± √ (-3)² - 4 × 1 × (-10) / 2×1

x = 3 ± √ 9 + 40 / 2

x = 3 ± √ 49 / 2

x = 3 ± 7 / 2 = • 3 + 7 / 2 = 10 / 2 = 5

• 3 - 7 / 2 = - 4 / 2 = -2

c) x² - 7x - 44 = 0

x = -(-7) ± √ (-7)² - 4 × 1 × (-44) / 2×1

x = 7 ± √ 49 + 176 / 2

x = 7 ± √ 225 / 2

x = 7 ± 15 / 2 = • 7 + 15 / 2 = 22 / 2 = 11

• 7 - 15 / 2 = -8 / 2 = -4