Question

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

2
x^ -10x+ what? ​

Answer 1

your answer will be 25

Explanation:

hope it helps

have a nice day

Answer 2

25

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