Which of the following is not a polynomial identity? A. a^3 - b^3 = (a - b)(a^2 + ab +b^2)
B. (a + b)^2 = a^2 + 2ab+b^2
C. (a + b)(c^2 - (d^2) = (ac-bd)^2+ (ad + bc)
D. a^2 - b^2 = (a + b)(a - b)

There are 3 patches i think

1) add 6 to 24, write the rest of the equation 10-2x= 30 subtract 10 from 30 2x=20 divide 20 by 2 and x=102) add 3 to -9 write the rest of the equation 4x+3=-6 subtract 3 from -6 4x=-9 x= -2.25  i don't know the rest sorry