Question

please give me the answer of my question​

Answer 1

Answer:

107x103

$= (100 + 7)(100 + 3) \\ = {100}^{2} + (7 + 3)100 + 7 \times 3 \\ = 10000 + 2100 + 21 \\ = 12121$

$56 \times 48 \\ = (50 + 6)(50 - 2) \\ = {50}^{2} + (6 - 2)50 - 6 \times 2 \\ = 2500 + 200 - 12 \\ = 2688$

Answer 2

Answer:

(i)(105+2)105-2)

(100+7)(100+3)

× a × b

(100)2+(3+7)100+3×7=10000+1000+2

=1102

(ii)(50+6)(50-2)

× a × b

(50)2+(b-2)50+6-2

=2500+200+2=2688

Step-by-step explanation:

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