PLEASE SOLVE AND CHECK

Solution:

Let us transpose -4 and 8x to the Left Hand Side. So we are left with 0 on the Right Hand Side.

Now, arrange the expression in standard form.

Now, split the mid term. Here, 3 × 4 = 12. So, we can split -8x into -2x and -6x.

Now, take 3x common from the first expression and 2 from the second.

When, two terms are equal to 0, then each term is equal to zero.

Hope you could understand.

If you have any query, feel free to ask.

none of the option is correct.

step-by-step explanation:

it says to find which expression equals 9^3 sqrt 10 = ?

9^3 sqrt 10 = 729 sqrt 10.

checking option a. 5 sqrt 10 + 4 sqrt 10

5 sqrt 10 + 4 sqrt 10

= 9 sqrt 10.

checking option b. 5^3 sqrt 10 + 4^3 sqrt 10

5^3 sqrt 10 + 4^3 sqrt 10

= 125 sqrt 10 + 64 sqrt 10

= 189 sqrt 10.

checking option c. 5 sqrt 10 + 4^3 sqrt 10

5 sqrt 10 + 4^3 sqrt 10

= 5 sqrt 10 + 64 sqrt 10

= 69 sqrt 10.

checking option d. 5^3 sqrt 10 + 4 sqrt 10

5^3 sqrt 10 + 4 sqrt 10

= 125 sqrt 10 + 4 sqrt 10

= 129 sqrt 10.

hence, none of the option is correct.