Which factorization is incorrect? 1)4k^2-49=(2k+7)(2k-7) 2)a^3-8b^3=(a-2b)(a^2+2ab+4b^2) 3)m^3+3m^2-4m+12=(m-2)^2 (m+3) 4)t^3+5t^2+6t+t^2+5t+6=(t+1)(t+2)(t+3)
The answer is 3) Just sub any number you want into the equation and calculate it. For example of 3） When m=1 Left hand size=1+3-4+12=12 Right hand size=-1x4=-4 Left hand size≠Right hand size It is incorrect.
