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lisov135 [29]
3 years ago
10

Help pls................

Mathematics
2 answers:
Sergeeva-Olga [200]3 years ago
5 0

Answer:

x = - 10, x = 10

Step-by-step explanation:

Given

- 7 + (x^2-19)^{\frac{3}{4} } = 20 ( add 7 to both sides )

(x^2-19)^{\frac{3}{4} } = 27 , that is

\sqrt[4]{(x^2-19)^{3} } = 27 ( raise both sides to the power of 4 )

(x² - 19)³ = 27^{4} = 531441 ( take the cube root of both sides )

x² - 19 = \sqrt[3]{531441} = 81 ( add 19 to both sides )

x² = 100 ( take the square root of both sides )

x = ± \sqrt{100} = ± 10

solution is x = - 10, x = 10

Dominik [7]3 years ago
4 0
Hai!!! Your answer is both x=-10 and x=10
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