Tìm x: a, (x + 3) × (9x + 1) - (3x + 5)^2 = 10; b, (2x - 3)^2 - (4x - 1) × (x - 2) = 10

Tìm x
a, ( x + 3) × (9x+1)-(3x+5)^2 = 10
b, (2x-3)^2 - (4x-1) × (x-2) = 10
c, (x+1)^3 - ( x+1)^2 - (x-3) × (x-2) = x^3 + 30 + x^2
d, (x-1)^3 - (x-2)^2 + (x+1) × (x+2) = x^3 - 40 - x^2