Question

Resolva as equações do 2º grau:



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Answer 1

Explicação passo-a-passo:

a) x(x-5) = 0

X=0

X-5=0

X=5

b) Y(Y+6) = 0

Y=0

Y+6=0

Y=-6

c) X(5x-3) = 0

X=0

5x-3=0

5x=3

X=3/5

d) X(-2x+6) = 0

X=0

-2x+6=0

2x=6

X=3

e)X(V3x+3) = 0

X=0

V3x+3=0

V3x=-3

X=-3/V3 -> -3/V3 • V3/V3 = -3V3 / 3 = - V3

f) Y² + 8y + 15 = 15

Y² + 8y = 0

Y(Y+8) = 0

Y=0

Y+8=0

Y=-8

g) 2x²/3 - 4x = 0 (x3)

6x² - 12x = 0

X(6x-12) = 0

X=0

6x-12=0

6x=12

X=2

h) t²+10t+25 = 25

T²+10t=0

T(T+10)=0

T=0

T+10=0

T=-10

i) 6x²+3x-4=-4

6x²+3x=0

X(6x+3)=0

X=0

6x+3=0

6x=-3

x=-1/2