Question

find the value of the following using suitable identity:
i)- (1010)² - (990)²



pls..tell me fast..​

Answer 1

Apply third identity of algebra

i.e. (a²-b²)=(a+b)(a-b)

Answer 2

Answer:

40,000

Step-by-step explanation:

${a}^{2} - {b}^{2} = (a + b)(a - b)$

=》Let 1010 be 'a' & 'b' be 990

=》(1010-990)(1010+990)

=》(20)(2000)

=》 40,000

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