Using the formula of (a + b)²
, find (i) (2x + 3y)
²
(ii) (103)²
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Answer:
(i). ( a+b)^ is a^+b^+2ab
(2x + 3y)^ is (2x)^ + (3y)^ + 2 × 2x × 3y
so, 4x^ + 9y^ + 12xy
Answer is 4x^ + 9y^ + 12xy.
Answer :
(ii). (103)^
(100+3)^ = (100)^ + (3)^ + 2 × 100 × 3 = 10000 + 9 + 600
So, 10000 + 9 + 600 = 10609
Answer is 10609.
Hope this helps you.
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