Question

desafio vcs!

quem consegui irei dar 20 pontos no Brainly​

Answer 1

Explicação passo-a-passo:

a)

$\sf{\sqrt{x + 1} = 7}$

$\sf{(\sqrt{x + 1})^2 = (7)^2}$

$\sf{x + 1 = 49}$

$\sf{x = 49 - 1}$

$\boxed{\sf{x = 48}}$

b)

$\sf{\sqrt{7 + x} = 3}$

$\sf{(\sqrt{7 + x})^2 = (3)^2}$

$\sf{7 + x = 9}$

$\sf{x = 9 - 7}$

$\boxed{\sf{x = 2}}$

c)

$\sf{\sqrt{2x - 4} = 6}$

$\sf{(\sqrt{2x - 4})^2 = (6)^2}$

$\sf{2x - 4 = 36}$

$\sf{2x = 36 + 4}$

$\sf{2x = 40}$

$\sf{x = \dfrac{40}{2}}$

$\boxed{\sf{x = 20}}$

d)

$\sf{\sqrt[3]{x + 2} = 2}$

$\sf{(\sqrt[3]{x + 2})^3 = (2)^3}$

$\sf{x + 2 = 8}$

$\sf{x = 8 - 2}$

$\boxed{\sf{x = 6}}$

e)

$\sf{\sqrt[3]{11x + 26} = 5}$

$\sf{(\sqrt[3]{11x + 26})^3 = (5)^3}$

$\sf{11x + 26 = 125}$

$\sf{11x = 125 - 26}$

$\sf{11x = 99}$

$\sf{x = \dfrac{99}{11}}$

$\boxed{\sf{x = 9}}$

f)

$\sf{\sqrt[4]{x - 3} = 2}$

$\sf{(\sqrt[4]{x - 3})^4 = (2)^4}$

$\sf{x - 3 = 16}$

$\sf{x = 16 + 3}$

$\boxed{\sf{x = 19}}$

g)

$\sf{\sqrt{2x + 5} - 1 = 0}$

$\sf{\sqrt{2x + 5} = 1}$

$\sf{(\sqrt{2x + 5})^2 = (1)^2}$

$\sf{2x + 5 = 1}$

$\sf{2x = 1 - 5}$

$\sf{2x = - 4}$

$\sf{x = - \dfrac{4}{2}}$

$\boxed{\sf{x = - 2}}$

h)

$\sf{\sqrt{x + 1} - 2 = 0}$

$\sf{\sqrt{x + 1} = 2}$

$\sf{(\sqrt{x + 1})^2 = (2)^2}$

$\sf{x + 1 = 4}$

$\sf{x = 4 - 1}$

$\boxed{\sf{x = 3}}$

i)

$\sf{2 + \sqrt{x + 4} = 5}$

$\sf{\sqrt{x + 4} = 5 - 2}$

$\sf{\sqrt{x + 4} = 3}$

$\sf{(\sqrt{x + 4})^2 = (3)^2}$

$\sf{x + 4 = 9}$

$\sf{x = 9 - 4}$

$\boxed{\sf{x = 5}}$

j)

$\sf{\sqrt{3 + x} = \sqrt{9 - x}}$

$\sf{(\sqrt{3 + x})^2 = (\sqrt{9 - x})^2}$

$\sf{3 + x = 9 - x}$

$\sf{x + x = 9 - 3}$

$\sf{2x = 6}$

$\sf{x = \dfrac{6}{2}}$

$\boxed{\sf{x = 3}}$

l)

$\sf{\sqrt{5x - 10} = \sqrt{8 + 3x}}$

$\sf{(\sqrt{5x - 10})^2 = (\sqrt{8 + 3x})^2}$

$\sf{5x - 10 = 8 + 3x}$

$\sf{5x - 3x = 8 + 10}$

$\sf{2x = 18}$

$\sf{x = \dfrac{18}{2}}$

$\boxed{\sf{x = 9}}$

m)

$\sf{\sqrt{2x - 3} - \sqrt{x + 11} = 0}$

$\sf{\sqrt{2x - 3} = \sqrt{x + 11}}$

$\sf{(\sqrt{2x - 3})^2 = (\sqrt{x + 11})^2}$

$\sf{2x - 3 = x + 11}$

$\sf{2x - x = 11 + 3}$

$\boxed{\sf{x = 14}}$

Answer 2

Resposta:

a resposta ta ai em cima vlw te amo

Explicação passo-a-passo: