Pls help I need this one 10 points question 2

21x^2 - 16x + 5

Yesss this is the answer :

(12x²-8)+(45x²-13)

(12x²+45x²)+(13-8)

57x⁴+5

the answer is 24

step-by-step explanation:

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!