Why can't we factor x^2+25?

Explanation: Notice that if x is Real then x2≥0 , so x2+25 has no linear factors with Real coefficients

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,