Question

x² + 8x + 16 =

x² - 5x - 14 =

x² - 11x - 42 =

x² - 2x - 63 =

x² - 10x + 25 =

x² - x - 72 =

me pueden ayudar , necesito las operaciones o almenos me explican .​

Answer 1

x² + 8x + 16 = 0

x²+ 8x + 16 = 0

x           + 4

x           + 4

4x + 4x = 8x

(x + 4)(x + 4) = 0

x + 4 = 0     x + 4 = 0

x = 4        x = 4

CS = ( 4 )

x² - 5x - 14 = 0

x           - 7

x           + 2

-7x + 2x = -5x

(x -7)(x + 2) = 0

x -7 = 0     x + 2 = 0

x = +7        x = -2

CS = (-2; +7)

        Eternamente

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