Round to the nearest whole number 90.05

90

Step-by-step explanation:

90.05

2 . Check the number to the right of it:

90.05

If the number is greater than or equal to 5, we round up. If it's less than or equal to four, we round down.

Zero is less than four. This means we round down.

90.05 ≈ 90

Hope this helps.

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8