Question

solve the problem.
Questions no. 3ka five

Answer 1

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here's ur answer ✍✍✍

➡️
$(102 \times 198) \\ (100 + 2)(100 + 98) \\ \bold{using \: identity = (x + a)(x + b)} \\ \bold{ = {x}^{2} + (a + b) \times x + ab } \\ = {100}^{2} + (98 + 2)100 + 98 \times 2 \\ = 10000 + 10000 + 196 \\ \boxed{= 20196}$

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Answer 2

Answer:

Step-by-step explanation:102×198

(100-2)×(100+2). (a+b)(a-b)=a square - b square

(100) square - (2)square

10000-4

9996

Hope you understood

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