Question

the value of x2 -5 at x= -1 is​

Answer 1

Answer:

look into this picture

hope it helps you

Answer 2

Answer:

hey dear here is your answer hope it helps you

Step-by-step explanation:

SOLUTION

We have the equation x2 – (a – 3)x – a –2 = 0.

its roots are m and n.

So, we have sum of roots = (m+n) = (a–3)

product of roots, mn = (–a–2)

Now m2+n2 = (m+n)2 – 2mn = (a–3)2 + 2(a+2)

= a2 + 9 – 6a + 2a + 4

= a2 - 4a + 4 + 9

= (a – 2)2 + 9

Since (a – 2)2 is a perfect square,

so its minimum value will be 0, when a = 2.

In that case, the minimum value of m2 + n2 will be 9.