ilovekylie2008
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Find the sum of (x + 1)² - 4 when x = 7 (I need an explanation-)​

Sagot :

TheExtraterrestrial

Question:-

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

Answer:-

60

Explanation:-

Please look at the attached picture :)

View image TheExtraterrestrial

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 ;

[tex]{:\implies \quad \sf p(x)=(x+1)^{2}-4}[/tex]

Now , substitute x = 7 ,

[tex]{:\implies \quad \sf p(7)=(7+1)^{2}-4}[/tex]

[tex]{:\implies \quad \sf p(7)=(8)^{2}-4}[/tex]

[tex]{:\implies \quad \sf p(7)=64-4}[/tex]

[tex]{:\implies \quad \bf \therefore \quad p(7)=60}[/tex]

Hence , The Required answer is 60

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