Question

Bassima evaluated the expression below.
2 (12 minus 14) squared minus (negative 5) + 12 = 2 (negative 2) squared minus (negative 5) + 12 = 2 (negative 4) minus (negative 5) + 12 = negative 8 + 5 + 12 = 9.
What was Bassima’s error?
Bassima did not multiply 2 and 12 first.
Bassima evaluated Minus (negative 5) as 5.
Bassima added and subtracted before multiplying.
Bassima evaluated (Negative 2) squared as mc024-4.jpg.

Answer 1

$Evaluation \: of \: the \: expression \\ by \:Bassima$

$2(12-14)^{2} - (-5) + 12 \: (given )$

$= 2(-2)^{2} - (-5) + 12 \: \blue{ ( correct ) }$

$= 2\red{ (-4) } - (-5) + 12 \: \pink{ ( wrong ) }$

$= 2\green {(4)} - (-5) + 12 \: \green { ( correct ) }$

$= 8 + 5 + 12$

$= 13 + 12$

$= 25$

Therefore.,

$\red{ Bassima \: evaluated \: (-2)^{2} \: as \: -4 } \\\green {instead \: of \: 4 }$

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