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Can someone help with B pls
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Can someone help with B pls

Can someone help with B pls-example-1
User Keval Doshi
by
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1 Answer

1 vote

Answer:

see explanation

Explanation:

(b)

Given

x² - 8x + 20 = (x - 4)² + 4

(x - 4)² will be positive for all real values of x , except x = 4, where it will be zero.

Then (x - 4)² > 0, so

(x - 4)² + 4 > 0 , that is always positive

User Thewaywewere
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