Question

5 x ao quadrado menos de 25 x + 30 = 0​

Answer 1

Boa tarde!

5x² - 25x + 30 = 0

a = 5

b= -25

c= 30

∆= b² - 4.a.c

∆= (-25)²-4.5.30

∆= 625 - 600

∆= 25

x = -b±√∆/2.a

x'= -(-25) + √25/10

x'= 25 + 5/10

x' = 30/10

x'= 3

x" = 25-5/10

x"= 20/10

x"= 2

S = { 2,3}

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