Question

02) resolva as equações de 2° grau
por favor me ajudaaaaaa


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Answer 1

Resposta:

a) x = 0

b) x1 = -√18 ^ x2 = √18

Explicação passo-a-passo:

2.

a) x^2 - 3x - 0

x^2 - 3x - 0 = 0

x^2 - 3x = 0

-x = 0

x = 0 / -1

x = 0

b) 2x^2 - 36 = 0

2x^2 = 36

x^2 = 36/2

x^2 = 18

x +- √ 18,,

x1 = -√18 ^ x2 = √18

o resto não consiguo ver bem.

By Aquimissone.

Answer 2

a)

$\color{blue}{{x}^{2}-3x=0}$

$\color{blue}{x(x-3)=0}$

$\color{blue}{x=0}\color{green}{\checkmark}$

$\color{blue}{x-3=0}$

$\color{blue}{x=3}\color{green}{\checkmark}$

b)

$\color{blue}{2{x}^{2}-98=0}$

$\color{blue}{2{x}^{2}=98}$

$\color{blue}{{x}^{2}=\frac{98}{2}}$

$\color{blue}{{x}^{2}=49}$

$\color{blue}{x=±sqrt{49}}$

$\color{blue}{x=±7}\color{green}{\checkmark}$

c)

$\color{blue}{{x}^{2}-6x+5=0}$

$\color{blue}{{x}^{2}-6x+5+4=0+4}$

$\color{blue}{{x}^{2}-6x+9=4}$

$\color{blue}{{(x-3)}^{2}=4}$

$\color{blue}{x-3=±\sqrt{4}}$

$\color{blue}{x-3=±2}$

$\color{blue}{x-3=2}$

$\color{blue}{x=2+3}$

$\color{blue}{x=5}\color{green}{\checkmark}$

$\color{blue}{x-3=-2}$

$\color{blue}{x=-2+3}$

$\color{blue}{x=1}\color{green}{\checkmark}$