Question

Calcule os seguintes produtos

a) (5x + 1) . (5x + 1 )

Answer 1

$25 {x}^{2} + 10x + 1$

Answer 2

25x^2 + 5x + 5x + 1

25x^2 + 10x + 1

a = 1

b = 10

c = 25

= b^2 - 4.a.c

= 10^2 - 4.1.25

= 100 - 100

= 0

x = -b +/- v

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2.a

x= - 10 + 0

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2.1

x = -10

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2

x = 5

x = - 10 - 0

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2.1

x = -10

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2

x = 5