. The expression to be added to (5m2 – 7m + 2) to produce (7m2 – 1) is

The expression to be added to (5m² – 7m + 2) to produce (7m² – 1) is

(a) m² - 2m.

(b) m² + 2m.

(c) -2m² – 7m + 3.

(d) 2m² + 7m - 3.

Best Answer

Ans: (d)

Explanation:

Let expression ‘A’ be added, then

5m² – 7m + 2 + A = 7m² - 1

or A = 7m² - 1 – 5m² + 7m - 2

or A = 2m² + 7m – 3

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