find and correct the errors in the following mathematical statements

Q10) Substituiting x = -3 in

(b)

x ^2 -5 x + 4 \: \: gives \: \: ( -3)^2 - 5 ( -3 ) + 4 = 9 - 15 + 4 = -2

Answers (1)

We need to substitute x = -3 in  x^2 - 5x + 4
                                            = (-3)^2-5(-3) + 4
                                          = 9 + 15 + 4=28
 so the given statement is wrong                              
Correct statement is   

x^2 - 5x + 4=28 

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