Z if d is equally to f plus10
9 to the 12th power would be 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 which would equal 282 429 536 481
= 90 (9*10)
Eight 9s do not equal 100. 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 72
81
20
Z if d is equally to f plus10
x3+2x2+5x+10=(x+2)(x2+5) Therefore the only real root to this equation is x=-2
1152
yes 9+ 9 9 9 9 + 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 +
2.250388e+167
90
It's 9*9*9*9*9*9*9*9*9 or 387,420,489
9 + (9/9) = 10 (99/9) - (9/9) = 10 [ (9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9) / 9 ] + (9/9) = 10
9+9+9+9+9+9+9=63
9 + 9 + 9 + 9 + 9 + 9 = 54
9 nine 9 9 9 9 9 9 9 9 9