49
Check when:-
4x2-28x+49 = 0
(2x-7)(2x-7) = 0
x = 7/2 and also x = 7/2
49
49
-12
(b/2)^2= 64
To make the expression (x^2 + 26x + A) a perfect square trinomial, we need to find the value of (A) that completes the square. The formula for a perfect square trinomial is ((x + b)^2 = x^2 + 2bx + b^2). In this case, we have (2b = 26), so (b = 13). Thus, (A) must be (b^2 = 13^2 = 169). Therefore, the value of (A) is 169.
What value, in place of the question mark, makes the polynomial below a perfect square trinomial?x2 + 12x+ ?
6.25
49
16
81.
49
None does, since there is no polynomial below.
26
64
38
-12
I'm going to go out on a limb and assume that y2 8y c actually means y^2 + 8y + c c = 16 makes a perfect square: (y + 4)^2 = (y+4)*(y+4) = y^2 + 8y + 16