Given a ⁃ B = a (AB + 7), then in equation 3 ⁃ x = 2 ⁃ 8, the value of X is

Given a ⁃ B = a (AB + 7), then in equation 3 ⁃ x = 2 ⁃ 8, the value of X is

Because a * b = a (AB + 7)
So 3 * x = 3 (3x + 7) = 9x + 21
2 × (8) = 2 (- 8 * 2 + 7) = - 32 + 14 = - 18
Because 3 ⁃ x = 2 ⁃ 8
So 9x + 21 = - 18
X = 39 out of 9

Given x ^ 2 + 8x-6 = 0, find the value of X (x + 1) (x + 7) (x + 8)

x(x+1)(x+7)(x+8)
=x(x+8) (x+1)(x+7)
=(x²+8x) (x²+8x+7)
=6×(6+7)
=78

7. It is known that: | x | = 2 has 2 / 3, | y | = 3 has 3 / 4, and XY is less than 0. If we want to find 6-8, we have the value of-7

X = ± 2 / 3, y = ± 3 / 4
xy

(- 7 / 12-5 / 6 + 8 / 9-3 / 4) × (- 36)

21+30-32+27=46