Q1 of 105 Page 280

Find the errors and correct the following mathematical sentences

(x + 4) (x + 2) = x2 + 8

If LHS is


(x + 4) (x + 2)


Then RHS would be


⇒ (x + 4) (x + 2)


= x2 + 4 × x + 2 × x + 2 × 4


= x2 + 4x + 2x + 8


= x2 + 6x + 8


The error is x2 + 6x + 8 instead of x2 + 8


Hence (x + 4) (x + 2) = x2 + 6x + 8


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