Question

3. Using (x + a) (x + b) =

2+ (a + b) x + ab, find

a) 103×104 b) 103×98​

Answer 1

Answer:

Here is your answer

Step-by-step explanation:

a) 103 × 104

= (100+3)(100+4)

using (x+a) (x+b) = x2 + (a+b) x + ab

100^2 + (3 + 4)100 + 3×4

= 10,000 + 700 + 12

= 10712

b) 103×98

= (95+8)(95+3)

using (x+a) (x+b) = x2 + (a+b) x + ab

95^2 + (8+3)95 + 8×3

= 9,025 + 1,045 + 24

= 10,094

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