Question

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36x²+12x=28x²+28

Answer 1

Respuesta:

Explicación paso a paso:

36.x² + 12.x = 28.x²+28

36.x² - 28.x² + 12.x - 28 = 0

8.x² + 12.x - 28 = 0

4 ( 2.x² + 3.x - 7) = 0

2.x² + 3.x - 7 = 0

Donde:

a = 2

b = 3

c = -7

Hallamos las raices usando la formula cuadrática:

x1 = [ -b + √(b² - 4.a.c) ] / 2.a

x1 = [ -3 + √(3² - 4.2.(-7)) ] / 2.2

x1 = [ -3 + √(9 + 56) ] / 4

x1 = [ -3 + √65 ] / 4

x1 = [ -3 + √65 ] / 4

x1 = 1,266

x2 = [ -b - √(b² - 4.a.c) ] / 2.a

x2 = [ -3 - √(3² - 4.2.(-7)) ] / 2.2

x2 = [ -3 - √(9 + 56) ] / 4

x2 = [ -3 - √65 ] / 4

x2 = [ -3 - √65 ] / 4

x2 = -2,766