Question

1) Calcule:
a) 3x² - 7x + 2 = 0
b) 6x² - 150 = 0
c) 2x²- 6x = 0​

Answer 1

Resposta:

A)3x2−7x+2=0  

(3)⋅x2+(−7)⋅x+(2)=0

x=−(−7)±(−7)2−4⋅(3)⋅(2)−−−−−−−−−−−−−−−−√2⋅(3)

x=7±49−(24)−−−−−−−−√6

x=7±25−−√6

x=7±(5)6

x1=126=(6)⋅(2)(6)=2

x2=26=(2)(2)⋅(3)=13

B)6x2−150=0  

(6)⋅x2+(−150)=0

x=±−(6)⋅(−150)−−−−−−−−−−−−√6

x=±900−−−√6

x=±(30)6

x=±(6)⋅(5)(6)

x1=5

x2=−5

Explicação passo-a-passo: