Question

Find the sum of (x + 1)² - 4 when x = 7 (I need an explanation-)​

Answer 1

We are given with a expression (x + 1)² - 4 and we need to find it's value when x = 7 . So , Let's name this polynomial first, let's say that p(x) = (x + 1)² - 4 . Now ;

`{:\implies \quad \sf p(x)=(x+1)^(2)-4}`

Now , substitute x = 7 ,

`{:\implies \quad \sf p(7)=(7+1)^(2)-4}`

`{:\implies \quad \sf p(7)=(8)^(2)-4}`

`{:\implies \quad \sf p(7)=64-4}`

`{:\implies \quad \bf \therefore \quad p(7)=60}`

Hence , The Required answer is 60

Answer 2

Question:-

Find the sum of (x + 1)² - 4 when x = 7

Answer:-

60

Step-by-step explanation:-

Please look at the attached picture :)