Answer:
Option A. The answer is incorrect; the plus sign should be a minus sign
Step-by-step explanation:
we have
x^{2}-14x+49
we know that
(x-b)^{2}=x^{2}-2bx+b^{2}
Solve for b
-2bx= -14x
2b= 14
b = 7
b^ = 49
b = 7
therefore
x^ - 14x + 49 = (x - 7)^ = (x - 7)(x - 7)
Verify each case
case A) The answer is incorrect; the plus sign should be a minus sign
The statement is true
case B) The answer is incorrect; The minus sign should be a plus sign
The statement is false
Because, the plus sign should be a minus sign
case C) The answer is incorrect; the 7's should be 14's
The statement is false
case D) The answer is correct
The statement is false
