Question

what number should be added to the expression x^2 + 10x to change it into a perfect square trinomial?​

Answer 1

25

Explanation:

In case anyone was confused the answer is 25. took the test.

Answer 2

`\large\boxed{5^2=25}`

Explanation:

`\text{Perfect square:}\ (a+b)^2=a^2+2ab+b^2\\\\x^2+10x\\\Downarrow\\x^2+2(x)(5)\\\Downarrow\\x^2+2(x)(5)+5^2=(x+5)^2`