Q. 1 J4.3( 14 Votes )

# <span lang="EN-US

If LHS is

x2 + 7x + 12

Then RHS would be

x2 + 7x + 12

Putting x = (-3)

= (–3)2 + 7 (–3) + 12

= 9 + (-21) + 12

= 21-21

= 0

The error is (-21) instead of 4 and end result 0 instead of 25

Hence putting x = (-3) in x2 + 7x + 12 results to 0

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