After factoring (2x) n-81, we get (4x2 + 9) (2x + 3) (2x-3), then n equals () A. 2B. 6C. 4D. 8

After factoring (2x) n-81, we get (4x2 + 9) (2x + 3) (2x-3), then n equals () A. 2B. 6C. 4D. 8

(4x2 + 9) (2x + 3) (2x-3), = (4x2 + 9) (4x2-9), = 16x4-81, = (2x) 4-81, so C

When x is the value, the expressions 3 / 4 [4 / 3 (1 / 2x-1) - 8] and 3 / 2x + 1
Satisfy the following conditions (1) equality (2) the value of equation 3 / 4 [4 / 3 (1 / 2x-1) - 8] is 4 less than that of equation 3 / 2x + 1
(/ stands for the fraction line, with numerator on the left and denominator on the right)

❶ 3 / 4 [4 / 3 (1 / 2x-1) - 8] = 3 / 2x + 11 / 2x-1-6 = 3 / 2x + 11 / 2x-3 / 2x = 1 + 7-x = 8x = - 8 & # 10103; formula 3 / 4 [4 / 3 (1 / 2x-1) - 8] is 43 / 4 [4 / 3 (1 / 2x-1) - 8] = 3 / 2x + 1-41 / 2x-1-6 = 3 / 2x + 1-41 / 2x-3 / 2x = - 3 + 7-x = 4x = - 4

When x is the value, the value of the formula X-1 / 2 + 2x-1 / 3 and 2x-3 / 6 + 1 are equal

x-1/2+2x-1/3=2x-3/6+1
x=1/3