00:01
So in this question, basically we need to tell which are the perfect square trinomials.
00:07
And we need to select two options.
00:09
So here we know that that a minus b whole square can be written as a square minus 2a, b and plus b square.
00:23
So if we see there are two squares that is a square and b square and both are perfect square.
00:32
So if we see, we have perfect square of x here and perfect square of 10 here, but it is a negative sign.
00:42
So this is not correct.
00:45
Now, this is perfect square, this is perfect square, this is perfect square, four is perfect square of two, five is perfect square of 25 is perfect square of five.
00:58
And 36 is a perfect score of six.
01:00
So we can have these options.
01:03
We can have these options.
01:04
Now we need to check whether minus 2ab is here or not...