Question

plzz help and explain step by step​

Answer 1

Explanation

Let x³ = a then,

f(a) = a² -7a -8

f(a) = a² - 8a + a -8

f(a) = (a-8 ) ( a+1)

here , f(a) = 0

therefore ,

=> a-8 = 0

=> a = 8

=> a = 8 = x³

so , x = 2

Answer 2

Answer:

your ans

Step-by-step explanation:

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