Question

Esse tem que fazer por baskara

Answer 1

Resposta:

A) 6x²-4x=5x²

6x²-4x-5x²=0

x²-4x=0

x-4=0

x'=0

x'=0x"=4

B) y²-169=0

y²= 169

y= +/- √169

y= +/- 13

y'= +13

y'= +13y''= -13

C) 3y²-7y+6=2y²

3y²-7y+6-2y²=0

y²-y-6y+6=0

y.(y-1)-6(y-1)=0

(y-1).(y-6)=0

y-1=0

y-6=0

y'= 1

y'= 1y"= 6

D) (x+6)(3-x)=20

3x-x²+18-6x=20

-3x-x²+18=20

-3x-x²+18-20=0

-3x-x²-2=0 ×(-1)

3x+x²+2=0

x²+3x+2=0

a= 1

b= 3

c= 2

x= -b+/-√b²-4.ac

2a

x= -3+/-√3²-4.1.2

2.1

x= -3+/-√9-8

2

x= -3+/-√1

2

x= -3+ 1 x= -3-1

2 2

x= -2 x= -4

2 2

x'= -1

x'= -1x"= -2

Espero ter ajudado!!

:)