Question

Fill in the blank with a number to make the expression a perfect square

Answer 1

Answer:

your answer will be 25

Step-by-step explanation:

hope it helps

have a nice  day

Answer 2

Answer:

25

Step-by-step explanation:

So basically remember that:

$(a+b)^2=a^2+2ab+b^2$

so far you have that

$a^2 = x^2\\2ab = -10x$

So if 2ab = -10x and a = x, that means 2xb = -10x so b = -5.

It's kind of confusing to think of it like that, but all that means is that the equation is:

$(x - 5)^2$

which would simplify to

$x^2 - 10x + 25$

so the blank is 25