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There are missing + or - symbols, but the square is completed in this case by dividing the coefficient of the x term by 2, giving:
(x ± 2)2 = x2 ±4x + 4
So to get to the original equation, there is needed an extra +1 or -9:
(x ± 2)2 +1 = x2 ±4x +5
(x ± 2)2 - 9 = x2 ±4x - 5
Depending upon what the missing (+-) symbols are. (Whatever the sign before the 4x, the same is used in the brackets of the square.)
What else can I help you with?
What number must be added to the polynomial to complete the square x2-5x?
-3
What number must be added to the polynomial to complete the perfect square x2-24x?
144
What number must be added to the polynomial to complete the square x2-9x?
-7
What number must be added to the polynomial to complete the square x2 7x?
49/4 or 12.25
What number must be added to x2 plus 9x to complete the square?
To complete the square for the expression (x^2 + 9x), take half of the coefficient of (x) (which is 9), square it, and add that value. Half of 9 is (4.5), and squaring it gives (20.25). Therefore, the number that must be added is (20.25). Thus, the completed square form is ((x + 4.5)^2).
What number must be added to x2 8x to complete the square?
To complete the square for the expression ( x^2 + 8x ), first take half of the coefficient of ( x ) (which is 8), square it, and add it. Half of 8 is 4, and squaring it gives ( 4^2 = 16 ). Therefore, the number that must be added to ( x^2 + 8x ) to complete the square is 16. Thus, the completed square form is ( (x + 4)^2 ).
What number must be added to x2 - 7x to complete the square?
9
What number must be added to the polynomial to complete the square x2 - 20x?
Adding 100 completes the square. { I wonder why you want to complete the square when the expression already factors as x(x-20) }.
What number must be added to 149 total 516\?
369 must be added to get 518
What group of organisms must be added to any food chain or food web to form a complete food cycle?
Decomposers must be added to any food chain or food web to form a complete food cycle.
What number must be added to complete the square of x SQUARED plus 12x equals -3?
9
What number must be added to -15 to get 11?
26
