Q

# find and correct the errors in the following mathematical statements Substituiting x = -3 in x ^ 2 -5 x+4 gives-3 ^ 2 - 5 (-3) +4 = 9 -15 +4 =-2

find and correct the errors in the following mathematical statements

Q10) Substituiting x = -3 in

(b)

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

Views

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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